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A bed is a piece of furniture that is used as a place to sleep, rest, and relax.[1][2]
Most modern beds consist of a soft, cushioned mattress on a bed frame. The mattress rests either on a solid base, often wood slats, or a sprung base. Many beds include a box spring inner-sprung base, which is a large mattress-sized box containing wood and springs that provide additional support and suspension for the mattress. Beds are available in many sizes, ranging from infant-sized bassinets and cribs, to small beds for a single person or adult, to large queen and king-size beds designed for two people. While most beds are single mattresses on a fixed frame, there are other varieties, such as the murphy bed, which folds into a wall, the sofa bed, which folds out of a sofa, the trundle bed, which is stored under a low, twin-sized bed and can be rolled out to create a larger sleeping area, and the bunk bed, which provides two mattresses on two tiers as well as a ladder to access the upper tier. Temporary beds include the inflatable air mattress and the folding camp cot. Some beds contain neither a padded mattress nor a bed frame, such as the hammock. Other beds are made specifically for animals.
Beds may have a headboard for resting against, and may have side rails and footboards. "Headboard only" beds may incorporate a "dust ruffle", "bed skirt", or "valance sheet" to hide the bed frame. To support the head, a pillow made of a soft, padded material is usually placed on the top of the mattress. Some form of covering blanket is often used to insulate the sleeper, often bed sheets, a quilt, or a duvet, collectively referred to as bedding. Bedding is the removable non-furniture portion of a bed, which enables these components to be washed or aired out.
Etymology
[edit]
In Europe, mattresses were stuffed with straw, chaff, animal hair (for instance horsehair, used for its resilience), coarse wool, or down feathers, and stacked, softest topmost. This pile of mattresses, and the sheets, blanket, and pillows, was what early Europeans called a "bed"; it might be packed away during the day (a usage which survives in words like featherbed). The bedframe, even when present, supported the bed, but was not considered part of it.[3]: 674–5 vol1 Later innovations made bedframes more portable, and increased their importance.[3]: 481vol3 : 674vol1 : 675–6 vol1
History
[edit]Prehistory
[edit]In August 2020 scientists reported the discovery of the oldest grass bedding from at least 200,000 years ago, much older than the oldest previously known bedding. They speculate that insect-repellent plants and ash layers, sometimes due to burned older grass beddings, found beneath the bedding have been used for a dirt-free, insulated base and to keep away arthropods.[4][5][6]
Ancient history
[edit]
Early beds were little more than piles of straw or some other natural material (e.g. a heap of palm leaves, animal skins, or dried bracken).[7] An important change was raising them off the ground, to avoid drafts, dirt, and pests.[citation needed] In the Miocene period, lasting from twenty-three to five million years ago, before the emergence of humans, apes began creating beds composed of a sleeping platform instead of sleeping on branches.[8]
Sub-Saharan Africa
[edit]Bedding dated around to 3600 BC was discovered in Sibudu Cave, South Africa.[9] The bedding consists of sedge and other monocotyledons topped with the leaves of Cryptocarya woodii.[9]
Europe
[edit]
Beds found in a preserved northern Scottish village, which were raised boxes made of stone and likely topped with comfortable fillers, were dated to between 3200 BC and 2200 BC.[10]
The Odyssey, an ancient Greek epic poem, describes the bed of its protagonist, Odysseus, and explains that he crafted the bed for himself and his wife, Penelope, out of a huge olive tree trunk that used to grow on the spot.[11] The poem's author, Homer, also mentions the inlaying of the woodwork of the bed with gold, silver, and ivory.[11]
Ancient Roman mattresses were stuffed with reeds, hay, or wool. Feathers were used towards the end of the Republic, when custom demanded luxury. Small cushions were placed at the head and sometimes at the back. The bedsteads were high and could only be ascended by the help of steps. They were often arranged for two people, and had a board or railing at the back, as well as the raised portion at the head. The counterpanes were sometimes very costly, generally purple embroidered with figures in gold; and rich hangings fell to the ground masking the front. The bedsteads themselves were often of bronze inlaid with silver, and Elagabalus had one of solid silver. In the walls of some houses at Pompeii bed niches are found which were probably closed by curtains or sliding partitions. Ancient Romans had various kinds of beds for repose. These included:
- lectus cubicularis, or chamber bed, for normal sleeping
- lectus genialis, the marriage bed, it was much decorated, and was placed in the atrium opposite the door
- lectus discubitorius, or table bed, on which they ate—for they ate while lying on their left sides—there usually being three people to one bed, with the middle place accounted the most honorable position
- lectus lucubratorius, for studying
- and a lectus funebris, or emortualis, on which the dead were carried to the pyre[12][13]
The Greeks and Romans were also having their meals in bed. They would recline on one side and reach out to pick up food from a nearby table.[14]
Near East
[edit]The Egyptians had high bedsteads which were ascended by steps, with bolsters or pillows, and curtains to hang around.[15] The elite of Egyptian society such as its pharaohs and queens even had beds made of wood, sometimes gilded. Often there was a head-rest as well, semi-cylindrical and made of stone, wood, or metal.[16] Ancient Assyrians, Medes, and Persians had beds of a similar kind, and frequently decorated their furniture with inlays or appliques of metal, mother-of-pearl, and ivory.

Medieval history
[edit]In the early Middle Ages they laid carpets on the floor or on a bench against the wall, placed upon them were mattresses stuffed with feathers, wool, or hair, and used skins as a covering. Curtains were hung from the ceiling or from an iron arm projecting from the wall.[18] They appear to have generally lain naked in bed, wrapping themselves in large linen sheets which were stretched over the cushions.

In the 12th century, luxury increased and bedsteads were made of wood much decorated with inlaid, carved, and painted ornamentation. They also used folding beds, which served as couches by day and had cushions covered with silk laid upon leather. At night a linen sheet was spread and pillows placed, while silk-covered skins served as coverlets. The Carolingian manuscripts show metal bedsteads much higher at the head than at the feet, and this shape continued in use until the 13th century in France, many cushions being added to raise the body to a sloping position. In 12th-century manuscripts, the bedsteads appear much richer, with inlays, carving, and painting, and with embroidered coverlets and mattresses in harmony. Curtains were hung above the bed and a small hanging lamp is often shown.[citation needed]
In the 14th century the woodwork became of less importance, generally being entirely covered by hangings of rich materials. Silk, velvet, and even cloth of gold were frequently used. Inventories from the beginning of the 14th century give details of these hangings lined with fur and richly embroidered. It was then that the Four poster bed (also known as a tester bed) made its first appearance, the bed being slung from the ceiling or fastened to the walls, a form which developed later into a room within a room, shut in by double curtains, sometimes even to exclude all drafts. The space between the bed and the wall was called the ruelle, and very intimate friends were received there. The 14th century was also the time when feather beds became highly prized possessions.[18] Beds in aristocratic residences can be distinguished by enclosed curtains, these beds would have mattresses and pillows that were filled with feathers. Sheets were made of linen and blankets of wool. Rails attached to the beds would be for hanging clothes or to hold candles. In less wealthy houses, the bed would be made of three planks and a mattress made of dried heather or fern, they would sleep with a single sheet and an old blanket.[19]
In the 15th century beds became very large, reaching 7 to 8 feet (2.1 to 2.4 m) by 6 to 7 feet (1.8 to 2.1 m). The mattresses were often filled with pea-shucks, straw, or feathers. At this time great personages were in the habit of carrying most of their property about with them, including beds and bed hangings, and for this reason the bedsteads were for the most part mere frameworks to be covered up; but about the beginning of the 16th century bedsteads were made lighter and more decorative, since the lords remained in the same place for longer periods.[citation needed]
Modern history
[edit]In the 17th century, which has been called "the century of magnificent beds", the style à la duchesse, with tester and curtains only at the head, replaced the more enclosed beds in France, though they lasted much longer in England. Louis XIV had an enormous number of sumptuous beds, as many as 413 being described in the inventories of his palaces. Some of them had embroideries enriched with pearls, and figures on a silver or golden ground. The great bed at Versailles had crimson velvet curtains on which "The Triumph of Venus" was embroidered. So much gold was used that the velvet scarcely showed.

In the 18th century feather pillows were first used as coverings in Germany, which in the fashions of the bed and the curious etiquette connected with the bedchamber followed France for the most part. The beds were a la duchesse, but in France itself there was great variety both of name and shape. The custom of the "bed of justice" upon which the king of France reclined when he was present in parliament, the princes being seated, the great officials standing, and the lesser officials kneeling, was held to denote the royal power even more than the throne.
Louis XI is credited with its first use and the custom lasted until the end of the monarchy. In the chambre de parade, where the ceremonial bed was placed, certain persons, such as ambassadors or great lords, whom it was desired to honour, were received in a more intimate fashion than the crowd of courtiers. At Versailles women received their friends in their beds, both before and after childbirth, during periods of mourning, and even directly after marriage—in fact in any circumstances which were thought deserving of congratulation or condolence. During the 17th century this curious custom became general, perhaps to avoid the tiresome details of etiquette. Portable beds were used in high society in France until the end of the Ancien Régime. The earliest of which mention has been found belonged to Charles the Bold. They had curtains over a light framework, and were in their way as fine as the stationary beds.
Iron beds appear in the 18th century; the advertisements declare them as free from the insects which sometimes infested wooden bedsteads. Elsewhere, there was also the closed bed with sliding or folding shutters, and in England—where beds were commonly quite simple in form—the four poster was the usual citizen's bed until the middle of the 19th century.
Bed sizes
[edit]
Bed sizes vary considerably around the world, with most countries having their own standards and terminology.
Notable examples
[edit]
One of the largest beds in the world is the Great Bed of Ware, made in about 1580. It is 3.26 metres (10.7 ft) wide, 3.38 metres (11.1 ft) long. The bed is mentioned by Shakespeare in Twelfth Night. It is now in the Victoria and Albert Museum (V&A) in London. Another bed in the V&A is the Golden Bed created by William Burges in 1879.[20]
In 1882, Nawab of Bahawalpur Sadiq Muhammad Khan Abassi IV had a bed made of dark wood ornamented with 290 kilograms (640 lb) of sterling silver. At each corner of the bed there was a life-sized bronze statue of a naked woman holding a fan. When the Nawab lay on the bed, his weight started a mechanism that made the women wave their fans and started a music box playing selections from Gounod's Faust.[21]
In 1865, a convertible bed in the form of an upright piano was available, which could provide home entertainment while saving space.[22]
Types
[edit]

There are many varieties of beds:
- An adjustable bed is a bed that can be adjusted to a number of different positions. Most hospital beds are adjustable, so that a patient can have different parts of their body elevated for medical reasons.[24] Some people have adjustable beds in private homes.[25] Some adjustable beds are designed for couples; they use two separate mattresses and adjustment mechanisms. This permits one partner to be lying flat to sleep while the other has the head and shoulders elevated to watch television or read. Couple adjustable beds also permit partners with different medical conditions to select a mattress positioning that best suits them.
- An air bed uses an air-inflated mattress, sometimes connected to an electric air pump and having variable, firmness controls. The portable version of an air bed can also be rolled up and packed; so is meant for travel or temporary guest use.[26]
- A bassinet is a bed specifically for newborns.[27]
- A box-bed is a bed having the form of a large box with wooden roof, sides, and ends, opening in front with two sliding panels or shutters; often used in cottages in Scotland: sometimes also applied to a bed arranged to fold up into a box.
- A brass bed has a frame constructed from brass. A brass-plated bed is a cheaper bed of iron with a thin covering of brass, which with time peels off and the iron is exposed.
- A bunk bed is two or more beds one atop the other. Bunk beds are used for adults in military barracks and in some ski lodges. Bunk beds are used for children and teens in summer camps. Some inexpensive hostels provide bunk beds for guests. Bunk beds are used for children in private homes.
- A loft bed is similar to a bunk bed, except there is no lower bunk. This leaves space underneath for storage, other furniture, a desk etc.
- A captain's bed[28] (also known as a "captain bed", "chest bed", or "cabin bed") is a platform bed with drawers and storage compartments built in underneath.
- A camp bed (also "cot", in American English) is a simple, temporary, portable bed used by armies and by campers. Camp beds are also used to provide a sleeping surface for refugees and other homeless people during disasters, floods, or other crises.
- A canopy bed is similar to a four poster bed, but the posts usually extend higher and are adorned or draped with cloth, sometimes completely enclosing the bed. Examples include the lit à la polonaise and the lit a la turque.
- A curtained bed is a luxury bed with curtains.
- A daybed is a couch that is used as a seat by day and as a bed by night. Usually it has pop up trundle which is used as bed in the night.
- A futon is a traditional style of Japanese bed using a mattress on a wooden frame. Futons are also available in a larger Western style which can fold halfway for sitting. Futons were traditionally made with cotton, but in the 2000s, many futons include synthetic foam.
- A four poster bed is a bed with four posts, one in each corner, that support a tester.
- A hammock is a piece of suspended fabric or netting, used on ships and in some homes.
- A hideaway bed, invented by Sarah E. Goode in response to the needs of apartment-dwellers, folds up into another piece of furniture, such as a shelf or desk, when not in use.
- A hospital bed is specifically designed to facilitate convalescence, traditionally in a hospital or nursing facility, but increasingly in other settings, such as a private residence. Hospital beds are typically adjustable, so that the head or feet can be raised or lowered. Modern hospital beds commonly have wheels to assist in moderate relocation, but they are larger and generally more permanently placed than a trolley (US: gurney). The "hospital bed" is also a common unit of measurement for the capacity of any type of inpatient medical facility, though it is just as common to shorten the term to "bed" in that usage (e.g. The hospital has 250 beds...).
- An infant bed (also "crib" or "cot") is a small bed specifically for babies and infants.
- An iron bed, developed in the 1850s, is constructed of iron and steel.
- A kang bed-stove is a Chinese ceramic room heater used as the platform for a bed.
- A Charpai is a traditional Punjabi bed made of tied ropes bordered by a wooden frame.[29]
- A mourning bed ("illustration") is a formal canopied bed, with the deceased, a wax effigy, or symbols of rank.
- A Murphy bed or wallbed is a bed that can fold up into a wall or cabinet to save space.[30]
- An Ottoman bed (in the UK) is a type of storage bed in which the storage area is placed underneath the mattress base and accessed by lifting the hinged mattress frame with the help of a spring or hydraulic mechanism.
- A pallet is a thin, lightweight mattress.
- A platform bed is a mattress resting on a solid, flat raised surface, either free-standing or part of the structure of the room.
- A roll-away bed is a bed whose frame folds in half and rolls in order to be more easily stored and moved. This is used in different settings, including hotels for either free or a nominal fee per night, where more people than expected may need to sleep in the same room, e.g. 5 people in a hotel room for 4 (two twin beds).
- A rope bed has a wooden frame within which crossing ropes, which may support a straw- or down-filled single mattress. See charpai.[29]
- A slat bed is a flatpack bed with wooden slats for the bedbase.
- A sofabed ("pull-out" or "pull-out bed") is a folding bed that is stored inside a sofa. Sofa beds are also called "convertibles" and "hideaways."
- A state bed developed in Early Modern Europe from a hieratic canopy of state.
- A toddler bed is a small bed for young children.
- A trundle bed or "truckle bed" is a bed usually stored beneath another bed during the day. They have been in use for centuries. In the modern era they are sometimes referred to as a "sleepover bed" or "daybed with pop up trundle."
- A vibrating bed (also known as a Magic Fingers bed) is typically a coin-operated novelty found in a vintage (c. 1960s-early 1980s) motel. For a nominal fee, the mattress vibrates for a duration of time. Alternatively it is a modern bed which vibrates by use of an off-centre motor. It is controlled by electronics for varying time and amplitude settings and is used therapeutically to ease back pains or as an erotic aid.
- A waterbed is a flexible plastic mattress full of water. The plastic container needs a strong frame around it.
Frames
[edit]Bed frames, also called bed steads, are made of wood or metal. The frame is made up of head, foot, and side rails. For heavy duty or larger frames (such as for queen- and king-sized beds), the bed frame also includes a center support rail. The rails are assembled to create a box for the mattress or mattress/box spring to sit on.
Types include:
- platform – typically used without a box spring.
- captain or storage – has drawers beneath the frame to make use of the space between the floor and the bed frame.
- waterbed – a heavy-duty frame built specifically to support the weight of the water in the mattress. (Mainly used on larger models)
Although not truly parts of a bed frame, headboards, footboards, and bed rails can be included in the definition. Headboards and footboards can be wood or metal. They can be stained, painted, or covered in fabric or leather.
Bed rails are made of wood or metal and are attached to a headboard and footboard. Wooden slats are placed perpendicular to the bed rails to support the mattress/mattress box spring. Bed rails and frames are often attached to the bed post using knock-down fittings.[31][32] A knock-down fitting enables the bed to be easily dismantled for removal. Primary knock-down fittings for bed rails are as follows:
- Pin-and-hook fastener. A mortise or slot is cut vertically in the bedpost. Pins are inserted horizontally in the bed post so that the pins perpendicularly intersect the mortise. For example, if one looked in the mortise, one might see part of one horizontal pin at the bottom of the mortise and a part of a second pin toward the top of the mortise. Hooks are installed at the end of the rail. Usually these hooks are part of a plate that is attached to the rail. The hooks then are inserted into the bed post mortise and hook over the pins.
- Plate-and-hook fastener. Instead of pins inserted horizontally into the bedpost, an eye plate (post plate) is installed on the bedpost. The hooks are installed on the rail, either as surface mount or recessed. Depending on the hardware, the bedpost may require a mortise in order to allow the hooks to fasten to the plate. This is also referred to as a keyhole fastener, especially if the connector is more of a "plug" than a "hook".
- Bed bolts ("through-bolts"), are a different means of a knock-down connection. A hole is typically drilled through the bedpost. The bolt head is inset and covered with a plug. In the rail, a dowel nut or other type of nut receives the bolt. The springs are made from metal, which are swirled for maximum comfort
Safety rails, or cot sides, can be added to the sides of a bed (normally a child or elderly person's bed) to stop anyone falling out of the sides of the bed.[33] A safety rail is normally a piece of wood that attaches to the side rails, on one or both sides of the bed. They are made so that they can be easily removed when no longer required.
See also
[edit]References
[edit]- ^ "Bed". The Free Dictionary By Farlex. Archived from the original on 27 May 2019. Retrieved 16 May 2012.
- ^ "Bed". Merriam-Webster. Archived from the original on 27 March 2019. Retrieved 16 May 2012.
- ^ a b Dictionnaire de l'ameublement et de la décoration depuis le XIIIe siècle jusqu'à nos jours, Havard, Henry, 1838-1921
- ^ "200,000 years ago, humans preferred to sleep in beds". phys.org. Archived from the original on 19 August 2020. Retrieved 6 September 2020.
- ^ "The oldest known grass beds from 200,000 years ago included insect repellents". Science News. 13 August 2020. Archived from the original on 18 August 2020. Retrieved 6 September 2020.
- ^ Wadley, Lyn; Esteban, Irene; Peña, Paloma de la; Wojcieszak, Marine; Stratford, Dominic; Lennox, Sandra; d'Errico, Francesco; Rosso, Daniela Eugenia; Orange, François; Backwell, Lucinda; Sievers, Christine (14 August 2020). "Fire and grass-bedding construction 200 thousand years ago at Border Cave, South Africa". Science. 369 (6505): 863–866. Bibcode:2020Sci...369..863W. doi:10.1126/science.abc7239. ISSN 0036-8075. PMID 32792402. S2CID 221113832. Archived from the original on 6 September 2020. Retrieved 6 September 2020.
- ^ Miller, Scott (14 June 2011). The President and the Assassin: McKinley, Terror, and Empire at the Dawn of the American Century. Random House Publishing Group. ISBN 978-0-679-60498-3. Archived from the original on 3 June 2022. Retrieved 3 June 2022.
- ^ "Chimpanzees Make Beds That Offer Them Best Night's Sleep". National Geographic News. 18 April 2014. Archived from the original on 22 October 2018. Retrieved 30 March 2018.
- ^ a b Wadley, Lyn; Sievers, Christine; Bamford, Marion; Goldberg, Paul; Berna, Francesco; Miller, Christopher (9 December 2011). "Middle Stone Age Bedding Construction and Settlement Patterns at Sibudu, South Africa". Science. 334 (6061): 1388–1391. Bibcode:2011Sci...334.1388W. doi:10.1126/science.1213317. ISSN 0036-8075. PMID 22158814. S2CID 11063722.
- ^ "Skara Brae – The Furniture". orkneyjar.com. Archived from the original on 19 August 2010. Retrieved 10 September 2010.
- ^ a b Grethlein, Jonas (12 March 2020). "Odysseus and His Bed: From Significant Objects to Thing Theory in Homer". The Classical Quarterly. 69 (2): 467–482. doi:10.1017/S0009838820000063. S2CID 216372888. Archived from the original on 29 September 2022. Retrieved 1 January 2021.
- ^ Chambers, Ephraim, ed. (1728). "Bed". Cyclopædia, or an Universal Dictionary of Arts and Sciences (1st ed.). James and John Knapton, et al. p. 94.
- ^ "BED". History of Science and Technology. Archived from the original on 24 April 2015. Retrieved 25 August 2014.
- ^ "13 facts about the history of the bed". Archived from the original on 13 July 2019.
- ^ Chisholm, Hugh (1910). The Encyclopaedia Britannica: A Dictionary of Arts, Sciences, Literature and General Information. At the University Press.
- ^ Smardzewski, Jerzy (18 June 2015). Furniture Design. Springer. ISBN 978-3-319-19533-9. Archived from the original on 3 June 2022. Retrieved 3 June 2022.
- ^ "Headrest with Two Images of the God Bes". Archived from the original on 14 July 2014. Retrieved 8 July 2014.
- ^ a b "Medieval Furniture & Home Decor". furniturestyles.net. Archived from the original on 27 November 2010. Retrieved 26 November 2010.
- ^ Mortimer, Ian (2009). The Time Traveller's Guide to Medieval England: A Handbook for Visitors to the Fourteenth Century. London: Vintage. pp. 160–161, 165. ISBN 9781845950996.
- ^ "The Golden Bed". Victoria and Albert Museum. 21 March 1879. Archived from the original on 29 June 2013. Retrieved 26 May 2013.
- ^ Independent (24 September 2015). "India's royal riches: The maharajas' opulent lifestyle". Independent.co.uk. Archived from the original on 30 July 2017. Retrieved 31 July 2017.
- ^ Brooklyn Museum. "Decorative Arts: Convertible Bed in Form of Upright Piano". Archived from the original on 28 October 2011. Retrieved 11 March 2012.
- ^ (in English) "Bed (Lit à la Polonaise)". getty.edu. Archived from the original on 1 March 2009. Retrieved 26 January 2009.
- ^ Pamela J. Carter (2007). Lippincott's Textbook for Nursing Assistants: A Humanistic Approach to Caregiving (Point (Lippincott Williams & Wilkins)). Hagerstown, MD: Lippincott Williams & Wilkins. p. 252. ISBN 978-0-7817-6685-2.
- ^ Best, Mary. "Dream machines: Adjustable bases charting big sales gains." BedTimes Magazine. November 2011. Retrieved 2011-11-20.
- ^ "Air bed definition and meaning | Collins English Dictionary". www.collinsdictionary.com. Retrieved 10 April 2018.
- ^ Liller, Karen DeSafey (2006). Injury Prevention for Children and Adolescents: Research, Practice, and Advocacy. American Public Health Association. ISBN 978-0-87553-068-0.
- ^ "Captain's bed". Dictionary.com. Archived from the original on 7 April 2014. Retrieved 26 May 2012.
- ^ a b Susan Corinne Jamart (1978). Charpai: Indian Cot Filling, a Visual and Technical Documentation. University of California, Berkeley.
- ^ "NY Bed Builder Dies". The Modesto Bee. Modesto, California. 23 May 1957. p. 15. Retrieved 8 February 2024 – via Newspapers.com.
- ^ "Historical Guide: Bed Hardware". whitechapel-ltd.com. Archived from the original on 12 March 2006.
- ^ "Bed Rail Fastener Options". home-improvement-and-financing.com. Archived from the original on 15 April 2017. Retrieved 15 April 2008.
- ^ "Bed Safety Rails". sleepcompare.com. Archived from the original on 16 November 2018. Retrieved 15 November 2018.
External links
[edit]Etymology and Terminology
Etymology
The word "bed" in English originates from Old English bedd, denoting a sleeping or resting place, which traces back to Proto-Germanic *badją. This Germanic root is thought to derive from the Proto-Indo-European (PIE) bʰédʰ-, meaning "to dig" or "to pierce," evoking early human sleeping arrangements as depressions or hollows dug into the earth for protection and comfort.[7][1] In Romance languages, the terminology for bed stems primarily from Latin lectus, referring to a couch or bed for reclining, which itself comes from the PIE root legh-, meaning "to lie down" or "to lay." This evolved into modern forms such as French lit and Italian letto, maintaining the association with a structured place for rest. Spanish cama, however, derives from Late Latin cama, likely of pre-Roman Iberian or Celtic origin, diverging from the lectus lineage and possibly linked to concepts of a low or ground-level resting structure. Across other Indo-European branches, similar roots reflect shared concepts of lying or resting. In Sanskrit, śayyā (a bed or couch) arises from the verbal root śī, meaning "to lie down," combined with the suffix -yā, highlighting the action-oriented origins of sleeping furniture in ancient Indo-Aryan languages. These linguistic paths illustrate how terms for bed consistently tied to natural human postures and environmental adaptations in prehistoric societies. Over time, the meaning of "bed" shifted from rudimentary earthen pits or mats in antiquity to more elaborate, crafted furniture by the Middle Ages, as societal advancements allowed for raised frames and upholstery, though the core etymological link to "digging" or "lying" persisted in denoting a dedicated sleep space.[7]Terminology
In contemporary usage, the term "bed" denotes a piece of furniture specifically designed for sleeping or resting, typically comprising a supportive structure, mattress, and coverings.[8] This definition establishes its scope within furniture, distinct from unrelated applications such as a garden bed—a cultivated plot of soil for plants—or a river bed, the sediment-covered bottom of a waterway.[9][10] Central to bed anatomy are the headboard and footboard, which serve both functional and aesthetic purposes. The headboard is a vertical panel affixed to the head end of the bed's framework, offering back support for sitting up and often featuring decorative elements.[11] The footboard, similarly, is a panel at the opposite end, providing enclosure and alignment for bedding while preventing items from sliding off during use.[11][12] Other specialized terms describe variations in bed design. A bunk, short for bunk bed, refers to a stacked arrangement of two or more sleeping platforms, commonly used to maximize space in shared rooms.[11] A divan designates a low-profile bed with a solid, upholstered base—often wooden and fabric-covered—that supports the mattress directly, frequently incorporating drawers for storage and omitting a footboard.[13] Regional variations include the futon, which in Japanese contexts traditionally consists of portable bedding elements like a thin shikibuton mattress and kakebuton quilt laid on the floor for sleeping.[14] In manufacturing and retail contexts, terminology distinguishes structural elements for clarity in assembly and sales. A bed frame encompasses the complete elevated structure, including side rails, legs, and often a headboard, upon which the mattress rests.[15] The bedstead is largely synonymous, referring to the foundational framework—typically wooden or metal—that positions the mattress without including the bedding itself.[16] In contrast, a bed base specifically indicates the supportive underlayer, such as slats, a platform, or box spring, which ensures mattress stability and may integrate with or sit atop a frame.[17][18]History
Prehistory
The earliest archaeological evidence of constructed sleeping arrangements dates to around 200,000 years ago at Border Cave in KwaZulu-Natal, South Africa, where layers of grass bedding from the Panicoideae subfamily were discovered, interspersed with ash deposits. These beds, up to 30 cm thick, were likely used for both sleeping and daily activities, with the ash serving as an insect repellent to deter ticks and other arthropods; the bedding was periodically burned and replenished for hygiene.[19] This finding indicates sophisticated site maintenance by early Homo sapiens or possibly other hominins in the region.[20] Subsequent evidence from Sibudu Cave, also in South Africa and dated to approximately 77,000 years ago, reveals layered mats constructed from sedges and aromatic leaves, such as those from the genus Hyperacanthus, selected for their natural insect-repelling properties against mosquitoes and other pests.[21] These mats, accumulating over thousands of years, demonstrate repeated use and renewal, highlighting early human awareness of environmental challenges like parasites and discomfort from uneven ground.[2] For Neanderthals, phytolith analysis at Esquilleu Cave in Cantabria, Spain, provides evidence of grass bedding around 55,000 to 49,000 years ago, where repeated layers near hearths suggest designated sleeping zones maintained over multiple occupations.[22] Prehistoric sleeping arrangements commonly incorporated natural materials for insulation, comfort, and protection, including grasses, leaves, and animal hides spread over the ground or simple earth depressions to shield against cold, dampness, and ground-dwelling parasites.[23] These depressions, often naturally occurring or slightly modified, offered rudimentary elevation from moisture and wildlife, as inferred from site distributions and ethnographic parallels with modern hunter-gatherers.[24] Animal hides, processed from hunted fauna, likely served as coverings or mats, providing warmth and portability for nomadic groups, though direct archaeological preservation is rare due to organic decay.[25] By the late Paleolithic period (circa 40,000–10,000 BCE), as human groups established semi-permanent camps, sleeping arrangements transitioned toward more structured setups, including bedding within brush huts and early raised platforms. At Ohalo II in Israel, dated to about 23,000 years ago, grass shoots were laid in shingle-like patterns along hut walls, covering the floor around a central hearth to create insulated sleeping areas elevated slightly from the bare earth.[23] This evolution reflects increasing sedentism and resource investment in domestic spaces, marking a shift from transient mats to integrated living structures.[26]Ancient Civilizations
In ancient Egypt, beds were constructed from wooden frames raised on short legs to protect against ground-dwelling creatures and moisture, often fitted with woven string bases overlaid by fine linen sheets for comfort. Instead of pillows, users employed carved wooden or ivory headrests to elevate the head, preserving elaborate hairstyles and believed to safeguard the vital ka spirit during sleep. A renowned example is the gilded funerary bed of Pharaoh Tutankhamun, dating to approximately 1323 BCE, which features a wooden structure covered in gold leaf and sheet gold, depicting protective deities like the hippopotamus goddess Taweret to ensure safe passage to the afterlife. These beds held ritual importance in mummification processes, where the embalmed body was ritually laid upon a similar frame during purification ceremonies before wrapping, symbolizing renewal and the deceased's continued existence. Headrests were routinely interred with mummies to support the head eternally, underscoring beliefs in the bed's role in bridging life and death. In Mesopotamia and the broader Near East during the third millennium BCE, sleeping arrangements favored practical, lightweight designs suited to the region's reed-abundant wetlands and urban environments. Beds typically comprised reed mats or bundled rushes elevated on low wooden or mud-brick platforms, sometimes overlaid with woolen textiles or animal skins for insulation; textual records from sites like Ur describe these as portable. Such elevated mats facilitated airflow in humid climates and aligned with nomadic influences, differing from the more rigid Egyptian forms. Greek and Roman civilizations refined the bed into the multifunctional lectus (or klinē in Greek), a reclining couch essential for symposia, dining, and sleeping, emphasizing social display over mere rest. Constructed with wooden frames reinforced by bronze fittings—such as lion's paw feet or griffin-head armrests—these beds supported mattresses of layered wool or straw topped with cushions stuffed with feathers or reeds, allowing diners to recline on the left side during banquets. Surviving artifacts, like those from Pompeii, reveal ornate bronze accents and adjustable backs, highlighting the lectus's evolution from utilitarian sleep furniture to a status symbol in elite triclinia. Regional variations across ancient societies reflected environmental adaptations and cultural priorities. In Nubia, part of Sub-Saharan Africa, elite burials from the Kingdom of Kush (circa 2500–1500 BCE) included wooden beds or leather mats placed on stone platforms, while everyday sleeping likely involved woven palm fronds or rush mats for their breathability in the hot Nile Valley climate. Similarly, in Mesoamerican civilizations like the Maya (circa 2000 BCE–900 CE), hammocks woven from cotton or sisal fibers suspended between posts served as primary sleeping apparatus, offering elevation from damp floors and insects; reed mats were also common in households and tombs, symbolizing purity and used in rituals. Archaeologically, these mats appear in royal contexts at sites like Tikal, denoting hierarchy. Beds carried profound social connotations, particularly in denoting status and communal bonds. In Egyptian tombs, the presence of lavishly decorated beds—reserved for nobility and pharaohs—signaled wealth and divine favor, with their inclusion ensuring eternal comfort and distinguishing elites from commoners who used simpler mats. This contrasted sharply with early European villages, such as those in Iron Age Gaul or Roman provinces, where families often shared communal sleeping spaces on straw pallets or raised platforms within single-room dwellings, fostering collective security but underscoring egalitarian domestic life among non-elites.Medieval and Early Modern Periods
In medieval Europe, beds evolved into more elaborate structures, particularly the four-poster bedstead, which featured tall posts supporting a canopy (tester) and curtains to provide warmth, privacy, and protection from drafts in often draughty castles and homes. These designs became prominent from the 14th century onward, with English examples documented in wills and inventories showing wooden frames draped in woolen or linen textiles, allowing multiple family members or servants to share the space for insulation during harsh winters.[27] In Asia, particularly northern China, the kang emerged as a multifunctional heated platform serving as both a bed and living area, constructed from brick or adobe with an integrated fireplace and flues to circulate warm air, maintaining a surface temperature around 40°C for sleeping and daily activities. Documented in texts from the late 5th to early 6th century, such as those by Li Daoyuan, the kang addressed the region's cold climate and was a staple in rural homes by the medieval period, with bedding rolled up during the day; similar systems influenced Japanese heating practices through cultural exchange during the Yayoi period and later adaptations.[28] In the Islamic world of the Middle East, sleeping arrangements favored low divans—raised platforms or benches upholstered with cushions and mattresses—suited to the region's warmer climate and floor-based lifestyles, often placed along walls in communal spaces for versatility in sitting or reclining. During the Fatimid era in Egypt (10th-12th centuries), raised bedsteads continued from Byzantine influences, sometimes screened with latticework like mashrabiya for privacy and natural ventilation to circulate air and reduce heat, reflecting architectural adaptations for comfort in arid environments.[29] The Renaissance period (14th-17th centuries) saw further elaborations in Europe, especially in Italy and France, where beds became symbols of wealth and status, often upholstered in luxurious velvet fabrics produced through advanced weaving techniques in Italian city-states like Venice and Florence. In Italy, these ornate beds formed a key part of the bridal dowry (donora), inventoried meticulously to affirm family alliances, with grooms curating bedchambers as central elements of wedding rituals to display opulence through embroidered hangings and canopied frames.[30][31] The Black Death plagues of the 14th century profoundly influenced bed-related hygiene across Europe, prompting stricter sanitary measures that emphasized cleaner bedding to combat disease transmission via vermin in shared sleeping spaces. Post-plague inventories reveal increased use of removable straw-filled ticks—fabric sacks stuffed with fresh straw or chaff that could be easily replaced or aired out—over permanent feather mattresses, reducing infestations of fleas and rodents while aligning with emerging public health controls like quarantine and disinfection.[27][32][33]Industrial and Contemporary Developments
The Industrial Revolution in the 19th century spurred significant advancements in bed design, particularly with the introduction of iron bedframes, which addressed growing concerns over hygiene amid urban epidemics like tuberculosis. These frames, valued for their durability, ease of cleaning, and resistance to vermin such as bedbugs, gained popularity as wooden beds were seen as harboring disease. Mass production techniques enabled widespread adoption, transforming beds from artisanal pieces to affordable household items.[34][35] A pivotal innovation in mattress technology came in 1871 when German inventor Heinrich Westphal developed the first coil-spring mattress, using interconnected steel springs to provide resilient support and ventilation, marking a shift toward more comfortable and hygienic sleeping surfaces. This innerspring design laid the foundation for modern mattresses, improving upon stuffed or horsehair fillings that were prone to dust and allergens.[36][37] The 20th century brought further milestones, including the waterbed invented by Charles Hall in 1968 as part of his master's thesis at San Francisco State University, featuring a vinyl mattress filled with water for fluid, body-conforming support that gained cultural traction during the counterculture era. In 1966, NASA researchers at Ames Research Center developed memory foam, a viscoelastic polyurethane material designed to cushion aircraft seats and absorb shocks, which later revolutionized bedding by molding to body contours for pressure relief. By the 1970s, adjustable bed bases transitioned from hospital use to consumer markets, with companies like Craftmatic introducing electric models in 1974 that allowed users to raise the head or foot for customized positioning, aiding those with health issues.[38][39][40] Entering the 21st century, beds integrated smart technology and sustainability. Sleep Number launched its 360 smart bed in 2017, equipped with sensors to track sleep patterns, heart rate, and breathing, automatically adjusting firmness and temperature via an app to optimize rest for individuals or couples. By 2025, advancements in AI-powered smart mattresses have further enhanced health monitoring, detecting metrics like respiration, heart rate variability, and potential sleep disorders to provide personalized insights and adjustments.[41][42] Concurrently, demand for eco-friendly materials surged, with organic latex—derived from natural rubber tree sap—becoming a preferred alternative to synthetic foams due to its biodegradability, breathability, and low environmental impact, as seen in certifications like GOLS (Global Organic Latex Standard).[43] Global efforts to standardize bed dimensions intensified in the 2000s, exemplified by the European Standard EN 1957:2000, which established test methods for mattress and bed durability, hardness, and sizes to facilitate cross-border trade and compatibility. This paved the way for broader ISO guidelines, such as ISO 24975, promoting uniform measurements for international manufacturing and consumer consistency.[44][45]Construction and Components
Frames
Bed frames are designed to help support and protect the mattress by forming the foundational structure of a bed, providing support for the mattress and ensuring stability during use.[46] They typically consist of a headboard, footboard, side rails, and a base system, designed to distribute weight evenly and accommodate various mattress types. Modern frames emphasize durability, ease of assembly, and aesthetic integration with bedroom decor, while historical designs prioritized basic functionality with available materials.[47] Common types of bed frames include upholstered, slatted, metal, and wooden varieties, each offering distinct materials and designs suited to different preferences.[48] Upholstered frames feature padded fabric or leather coverings over a wooden or metal core, providing a soft, luxurious appearance often seen in contemporary or traditional settings. Slatted frames use horizontal supports—either wooden or metal—to create an open base that promotes airflow and eliminates the need for a box spring; these are popular in platform beds for their minimalist profile. Metal frames, constructed from materials like steel tubing, brass, or iron, deliver a sleek, industrial look with high strength, while wooden frames employ solid hardwoods such as pine for affordability or oak for robustness, often incorporating joinery techniques like mortise-and-tenon joints to ensure long-term integrity without visible fasteners.[47][49][50] Key features of bed frames enhance their functionality and adaptability. Side rails connect the headboard and footboard, forming the perimeter and preventing mattress slippage, with reinforced designs in larger frames to handle increased stress. Center supports, typically adjustable metal legs or beams, are essential for queen and king sizes to prevent sagging in the middle, distributing weight across the frame. Adjustable height mechanisms, such as telescoping legs or hydraulic lifts, allow users to customize the bed's elevation from about 7.5 to 15.5 inches, improving accessibility for those with mobility needs.[47][51][52] The evolution of bed frame materials reflects advancements in comfort and manufacturing. Early designs from the Renaissance period (14th–17th centuries) relied on rope webbing, where ropes were interlaced through holes in wooden side rails to form a flexible base, requiring frequent tightening to maintain tension. By the 19th century, metal springs began replacing ropes for greater resilience, though they introduced noise issues. Modern frames transitioned to plywood or solid wood slats in the 20th century, offering superior ventilation and support without the maintenance of ropes; these slats, spaced 2–3 inches apart, provide load-bearing capacities of 500–1,000 pounds for queen-size frames, depending on material thickness and construction quality.[53][3][54] Assembly methods significantly impact a frame's durability and user experience. Bolt-on assemblies, common in both wooden and metal frames, use threaded fasteners to connect components like side rails to the headboard, allowing for straightforward disassembly and adjustments but potentially loosening over time if not torqued properly. Welded constructions, prevalent in steel metal frames, fuse joints permanently for enhanced rigidity and resistance to shear forces, making them ideal for heavy-duty applications, though they limit modularity. High-quality frames combine both techniques, such as welded cores with bolted attachments, to balance strength and convenience.[55][56]Mattresses and Foundations
Mattresses serve as the primary cushioned surface of a bed, designed to provide comfort, support, and pressure relief for sleepers.[57] They typically consist of layers that conform to the body while maintaining spinal alignment, with common constructions including innerspring, foam, latex[58], hybrid, and airbed varieties. Foundations, placed beneath the mattress, offer underlying support to enhance durability and prevent excessive wear, with options ranging from traditional box springs to solid platforms. These components work together to distribute body weight evenly, reducing strain on the musculoskeletal system.[59] Innerspring mattresses rely on a core of steel coils for support, often using Bonnell coils, which are hourglass-shaped and interconnected to create a bouncy, responsive feel.[60] These coils are typically made from wire gauges of 12 to 16, where lower numbers indicate thicker, more durable wire capable of withstanding greater torque and compression over time, contributing to the mattress's longevity. Foam mattresses, in contrast, use materials like polyurethane memory foam or natural latex, which mold to the body's contours for enhanced pressure relief without the bounce of springs; polyurethane foams are synthetic and affordable, while latex offers natural resilience and breathability[61]. Hybrid mattresses combine innerspring coils with foam or latex layers atop the core, balancing firm support from the coils with the conforming comfort of foam for improved motion isolation and edge strength.[62] Airbeds feature an adjustable air chamber system, allowing users to customize firmness by inflating or deflating the chambers, often paired with foam comfort layers for stability.[59][63][64][65] Foundations support the mattress and can influence its performance, with box springs consisting of a ventilated wooden frame enclosing a grid of steel wires or light coils to absorb motion and elevate the sleep surface. These units promote airflow to prevent moisture buildup but may introduce slight bounce, making them suitable for innerspring mattresses. Solid platform foundations, often constructed from wood slats or a continuous panel, provide a firm, stable base without springs, offering better compatibility with foam, hybrid, or airbed mattresses by minimizing sagging and enhancing overall durability. Unlike box springs, solid platforms are typically lower in height and quieter, though they require slat spacing no wider than 3 inches to ensure proper support.[66] Ergonomic considerations in mattresses focus on firmness levels, categorized from soft to extra-firm, which affect spinal alignment by promoting neutral posture—firmer options suit back and stomach sleepers for lumbar support, while softer ones benefit side sleepers by cushioning shoulders and hips. Firmness is quantified using Indentation Load Deflection (ILD), a standard measure where the force in pounds required to compress a 4-inch foam sample by 25% determines the rating; for example, ILD values of 14-20 indicate soft foam, 21-29 medium, and 30+ firm, guiding selections for optimal body support and reduced back pain. Proper firmness helps maintain the spine's natural curve, potentially alleviating pressure points and improving sleep quality.[67][68] The average lifespan of a mattress is 7 to 10 years, depending on material quality, usage, and maintenance, after which it may develop indentations exceeding 1.5 inches that compromise support.[69][70][71][72] To prevent sagging, especially at the edges, many innerspring and hybrid models incorporate reinforced edge supports like foam encasements or heavier-gauge coils, which distribute weight more evenly and extend usability. Regular maintenance, such as rotating the mattress every 3-6 months, helps prolong its life by evening out wear patterns.[69][70][71]Bedding and Accessories
Bedding and accessories encompass the removable layers and add-ons placed atop a bed's core structure to improve comfort, hygiene, and visual appeal. These items, which include sheets, pillows, duvets, and protective elements, are designed for regular use and maintenance, allowing users to customize their sleep environment based on personal preferences for temperature regulation and support.[73] Sheets form the foundational layer of bedding, directly contacting the skin and influencing sleep quality through their texture and breathability. Percale sheets feature a plain weave that creates a crisp, matte finish, promoting airflow and a cooler feel, with typical thread counts ranging from 200 to 400 for optimal durability and comfort.[74] In contrast, sateen sheets use a satin weave for a smoother, silkier surface that drapes elegantly, often with thread counts between 300 and 600 to enhance their sheen without compromising strength.[75] Sheets are available in all standard mattress sizes, such as twin, full, queen, king, and California king.[76] Quality sheets generally fall within a thread count of 200 to 800, beyond which higher numbers may indicate multi-ply yarns that reduce breathability rather than improve it.[77] Pillows provide essential head and neck support, with fill materials varying to suit different sleep positions and sensitivities. Down pillows, filled with the soft undercoating of waterfowl, offer a lofty, compressible plushness that conforms to the body for pressure relief.[78] Synthetic fills, such as polyester fibers, mimic down's insulation while being more affordable and easier to maintain, often used in down-alternative options for their lightweight resilience.[79] Buckwheat pillows, filled with the hulls of buckwheat seeds, deliver a firm, moldable structure that allows for customizable loft and promotes airflow to prevent overheating.[80] Duvets and comforters serve as primary insulating layers, trapping warmth while allowing for seasonal adjustments. A duvet consists of a soft insert encased in a removable cover, enabling easy washing and style changes, with fills like down or synthetics providing high loft for superior thermal retention.[81] Comforters, by comparison, are standalone quilted pieces where the fill is stitched directly into a durable shell, offering a more structured appearance and simpler care routine without the need for separate covers.[82] Among accessories, mattress protectors shield the underlying sleep surface from spills and wear, featuring thin waterproof membranes like polyurethane that block liquids while remaining breathable and quiet during use.[83] Bed skirts, also known as dust ruffles, drape from the mattress edge to the floor, concealing the bed base and preventing dust accumulation beneath for a tidier aesthetic.[73] Adjustable wedges elevate specific body areas, such as the head or legs, with foam inclines typically ranging from 6 to 12 inches high to aid in reducing acid reflux or improving circulation.[84] Material properties in bedding prioritize breathability and allergen resistance to enhance sleep hygiene. Cotton, a staple in sheets and covers, excels in moisture-wicking by absorbing up to 27 times its weight in water while allowing vapor to escape, maintaining a dry sleep surface.[85] Hypoallergenic treatments, such as synthetic fiber clusters or antimicrobial infusions in pillows and duvets, minimize dust mite proliferation and mold growth, reducing irritation for sensitive users.[86] Proper care ensures bedding longevity and safety, with sheets and pillowcases recommended for weekly washing in hot water (at least 130°F) to eliminate allergens and bacteria.[87] Duvets and comforters should be cleaned every few months or as needed, following manufacturer guidelines to preserve fill integrity. Certifications like OEKO-TEX Standard 100 verify that textiles are tested for over 100 harmful substances, including pesticides and heavy metals, ensuring chemical safety from production to use.[88]Types and Variations
By Design and Function
Beds are categorized by their structural form and intended purpose, encompassing a range of designs that prioritize aesthetics, space efficiency, or specialized functionality. Standard designs include the platform bed, which features a low-profile frame with a solid or slatted base that supports the mattress directly, eliminating the need for a box spring and promoting a minimalist aesthetic.[89] The captain's bed incorporates built-in storage drawers beneath the sleeping surface, ideal for maximizing organization in compact spaces.[90] In contrast, the sleigh bed is distinguished by its curved, scroll-like headboard and footboard, evoking a classic, rolling silhouette reminiscent of early 19th-century influences.[91] Functional types address practical needs such as space conservation or versatility. Bunk beds consist of two or more stacked sleeping platforms, typically connected by a ladder, designed to save floor space in shared or limited environments like children's rooms.[92] Trundle beds feature a secondary mattress that pulls out from under the primary frame, providing flexible guest accommodations without permanent expansion.[93][94] The daybed serves as a hybrid sofa and bed, with an extended frame that allows daytime seating and nighttime reclining, often upholstered for lounge-like appeal.[95] Hospital beds, engineered for medical use, include adjustable mechanisms to elevate the head, foot, or overall height, facilitating patient care and comfort during recovery.[96] Specialty designs cater to unique environments or sensory experiences. The Murphy bed folds vertically into a wall-mounted cabinet, transforming into a desk or shelf when stored to optimize small living areas.[97] Hammock beds suspend the sleeping surface from a frame or ceiling using ropes or fabric, offering a swaying motion that promotes relaxation in outdoor or casual settings.[98] Waterbeds utilize a vinyl mattress filled with water, creating a fluid, wave-like support that conforms to the body and minimizes pressure points.[93] Adaptations for accessibility focus on ease of use for individuals with mobility challenges, such as low-entry beds that position the mattress close to the floor—typically as low as 7 to 10 inches—to reduce fall risks and simplify ingress and egress for elderly users.[99] These designs often integrate side rails or height-adjustable features to enhance safety without compromising independence.[99]By Size and Standards
Bed sizes are standardized to ensure compatibility between mattresses, frames, and bedding across manufacturers, with dimensions varying by region to accommodate different cultural and spatial norms. In the United States, common sizes include the Twin at 38 inches wide by 75 inches long, suitable for single sleepers or children; the Full at 54 inches wide by 75 inches long, offering more space than a Twin; the Queen at 60 inches wide by 80 inches long, the most common mattress size in the U.S. market and popular for couples; and the King at 76 inches wide by 80 inches long, providing ample room for larger households. The California King is also a standard US mattress size, measuring 72 inches wide by 84 inches long, particularly suited for taller individuals due to its extra length.[100][101][102][103][104] In metric equivalents used in Europe, common sizes include the single at 90 cm wide by 200 cm long, the double at 140 cm by 200 cm, a larger size often equivalent to queen at 160 cm by 200 cm (commonly called king), and king at 180 cm by 200 cm, reflecting a preference for longer lengths to suit average adult heights in the region.[105][106] Historical standardization in the U.S. emerged prominently in the mid-20th century, with the Full size gaining traction in the 1950s as an intermediate option between single and larger beds.[107] The introduction of Queen and King sizes in 1958 by Simmons, based on research into sleep patterns and couple preferences, marked a key milestone in formalizing these dimensions for mass production.[108] In contrast, UK standards evolved separately, featuring sizes such as the Small Single at 30 inches wide by 75 inches long (76 cm by 190 cm), suitable for children or narrow spaces, and the small double at 48 inches wide by 75 inches long (120 cm by 190 cm) for compact rooms, distinct from U.S. equivalents.[109][110] Standards bodies establish guidelines for safety and interoperability to prevent hazards and ensure product durability. The American Society for Testing and Materials (ASTM) International sets performance requirements through standards like F3186-17 for adult portable bed rails, which include tests for side rail stability to mitigate entrapment and collapse risks under load.[111] These protocols verify that rails remain secure when attached to standard bed frames, addressing common injury patterns in consumer use.[112] Regional and functional variations adapt standard sizes for specific needs, such as extra-long options for taller individuals. Twin XL beds measure 38 inches by 80 inches, Full XL beds measure 54 inches by 80 inches,[113] while California King sizes at 72 inches by 84 inches provide additional length for users over 6 feet 2 inches tall, allowing diagonal sleeping without overhang. A variation known as the Split California King maintains the same dimensions of 72 inches wide by 84 inches long but is split down the middle into two separate mattresses, often used with adjustable bed frames or to accommodate differing firmness preferences between partners.[114] A similar variation, the Split Queen, maintains the standard Queen dimensions of 60 inches wide by 80 inches long but is split down the middle into two separate mattresses, often used with adjustable bed frames or to accommodate differing firmness preferences between partners.[115] The Alaskan King is an extra-large mattress size measuring 108 inches by 108 inches, suitable for multiple sleepers or special needs.[116] The Texas King is an oversized mattress size measuring 80 inches by 98 inches, suitable for larger sleeping arrangements or special needs.[117] The Wyoming King is an oversized mattress size measuring 84 inches by 84 inches, suitable for multiple sleepers or special needs.[118] In recreational vehicles (RVs) and campers, compact dimensions like 32 inches by 72 inches for bunk beds or 60 inches by 75 inches for short queens optimize space while maintaining comfort during travel.[119] These adaptations ensure beds fit constrained environments without compromising support.[120]| Region | Size | Dimensions (inches) | Dimensions (cm) |
|---|---|---|---|
| US | Twin | 38 × 75 | 97 × 191 |
| US | Full | 54 × 75 | 137 × 191 |
| US | Queen | 60 × 80 | 152 × 203 |
| US | King | 76 × 80 | 193 × 203 |
| US | California King | 72 × 84 | 183 × 213 |
| Europe | Single | 35 × 79 | 90 × 200 |
| Europe | Double | 55 × 79 | 140 × 200 |
| Europe | 160 cm (King equiv.) | 63 × 79 | 160 × 200 |
| Europe | King | 71 × 79 | 180 × 200 |
| UK | Small Double | 48 × 75 | 120 × 190 |
| UK | Small Single | 30 × 75 | 76 × 190 |