How Wide Is A Full Mattress. Sufficient for adults that need more room than what a twin can offer. At 53 inches wide a double mattress is 15 inches wider than a twin and is suitable for a single sleeper under 5 feet 5 inches in height.

A full mattress is 15 wider than a twin bed but the same length. 9 feet 6 inches by 10 feet 6 inches. These beds have the same length as a twin bed 75 inches but they are 16 inches wider.
These beds have the same length as a twin bed 75 inches but they are 16 inches wider.
The size of the bed frame varies according to its design. These beds have the same length as a twin bed 75 inches but they are 16 inches wider. At 53 inches wide a double mattress is 15 inches wider than a twin and is suitable for a single sleeper under 5 feet 5 inches in height. Contrary to popular belief a double or full bed is only 15 inches wider than a single not double.