Definition of Twin Size

Meaning of the Term as it Pertains to Mattresses

What is Twin Size?

Twin size indicates a mattress measuring 39 inches wide by 75 inches long. A smaller mattress size, a twin mattress is a popular choice for children and teens. The mattress is also commonly used in guest rooms, dormitories, or small rooms where homeowners want to maximize space. Twin is the next step up from the crib mattress but can accommodate someone as large as an average-sized adult.

The twin size is deal for shared rooms. The name comes from the fact that they are often used as a matching pair. Able to fit side by side and in bunk bed setups, twins give two individuals their own personal sleeping space in one room. Twin mattresses also commonly fit in trundles. Sheets and comforters must be purchased in twin size for best fit.