A box (plural: boxes) is a container with rigid sides used for the storage or transportation of its contents. Most boxes have flat, parallel, rectangular sides (typically rectangular prisms). Boxes can be very small (like a matchbox) or very large (like a shipping box for furniture) and can be used for a variety of purposes, from functional to decorative.

Boxes may be made of a variety of materials, both durable (such as wood and metal) and non-durable (such as corrugated fiberboard and paperboard). Corrugated metal boxes are commonly used as shipping containers.

Boxes may be closed and shut with flaps, doors, or a separate lid. They can be secured shut with adhesives, tapes, string, or more decorative or elaborately functional mechanisms, such as catches, clasps or locks.

Several types of boxes are used in packaging and storage.

Depending on locale and usage, the terms carton and box are sometimes used interchangeably. The invention of large steel intermodal shipping containers has helped advance the globalization of commerce.

Boxes for storing various items in can often be very decorative, as they are intended for permanent use and sometimes are put on display in certain locations.

The following are some types of storage boxes :