Unlike the name might suggest oddly enough the twin size is actually enough for one person and is often referred to as. A mattress of this size is often used for bunk beds in ships barracks dorms and guest rooms. Bed Sizing Chart Quilt Sizes Mattress Sizes No matter what your reason is for wanting information about bed sizes we will help you. Bed sizes chart . Twin 38 wide x 75 long. 38 wide x 74 long. Us bed size chart are you shopping for a new bed. Yes full size beds and double beds are the same thing. For kids there are no mattress sizes smaller except for a small single. Mattress size names and their dimensions. Full aka standard double. Both terms refer to mattresses measuring 54 inches by 75 inches. A full mattress is 15 wider than a twin bed but the same length. This is suitable for larger kids teenagers and single adults in small apartments. Fitted sheet measurements include dimensions for length width and pocket depth. 54 wide x 80. 54