What are the standard dimensions of a twin size mattress?

The standard dimensions of a twin size mattress are 38 inches in width and 75 inches in length. This size is specifically designed to accommodate a single sleeper, making it ideal for smaller spaces such as children's rooms, guest rooms, and apartments. The twin mattress offers a balance between functionality and space efficiency, providing enough sleeping area without taking up excessive room.

Although other mattress dimensions mentioned may serve different purposes—like a full size intended for two individuals or a queen and king for more spacious arrangements—none match the specific measurements associated with a twin size. Understanding these standard dimensions is essential for selecting the appropriate bed frame, bedding, and for overall room layout planning.