History of the kilt

The history of the modern kilt stretches back to at least the end of the 16th century. The kilt first appeared as the belted plaid or great kilt, a full-length garment whose upper half could be worn as a cloak draped over the shoulder, or brought up over the head as a hood. The small kilt or walking kilt (similar to the modern or military kilt) did not develop until the late 17th or early 18th century, and is essentially the bottom half of the great kilt.

The noun kilt comes from the Scots verb kilt meaning 'to tuck up the clothes around the body'. The Scots word derives from the Old Norse kjalta (meaning 'lap', 'fold of a gathered skirt').

The belted plaid (breacan an fhéilidh) or great plaid (feileadh mòr), also known as the great kilt, is likely to have evolved over the course of the 16th century from the earlier "brat" or woollen cloak (also known as a plaid) which was worn over a tunic (the léine), which was also worn by the Gaelic Irish. This earlier cloak may have been plain in colour or in various check or tartan designs, depending on the wealth of the wearer; this earlier fashion of clothing had not changed significantly from that worn by Celtic warriors in Roman times.

Over the course of the 16th century, with the increasing availability of wool, the cloak had grown to such a size that it began to be gathered up and belted. The belted plaid was originally a length of thick woollen cloth made up from two loom-widths sewn together to give a total width of 54 to 60 inches (140 to 150 cm), and up to 7 yards (6.4 m) in length. This garment was gathered up into pleats and secured by a wide belt.

Plaids with belt loops were in use by the 18th century. A surviving men's belted plaid from 1822 has a belt loops sewn inside it at each pattern repeat, such that it can be unpleated entirely into a blanket, or rapidly pleated with a hidden drawstring belt (with a second belt worn outside, to flatten the pleats, as in the portrait of Lord Mungo Murray above).

The upper half could be worn as a cloak draped over the left shoulder, hung down over the belt and gathered up at the front, or brought up over the shoulders or head for protection against weather. It was worn over a léine (a full-sleeved tunic stopping below the waist) and could also serve as a camping blanket.

A description from 1746 states:

The garb is certainly very loose, and fits men inured to it to go through great fatigues, to make very quick marches, to bear out against the inclemency of the weather, to wade through rivers, and shelter in huts, woods, and rocks upon occasion; which men dressed in the low country garb could not possibly endure.