Twin Size Bed Dimensions
A twin size bed is a popular choice for children’s bedrooms, guest rooms, and small spaces. It is the smallest standard mattress size available, measuring 39 inches wide by 75 inches long. Twin beds are also known as single beds.
Twin Size Bed Measurements in Inches
The dimensions of a twin size bed are 39 inches wide by 75 inches long. This measurement includes the frame and mattress. The width of a twin bed is the same as a single bed, but it is 5 inches longer than a single bed.