* Updated Tuesday, January 16, 2018 3:14:13 pm Atlanta time - Weather by CustomWeather, Â© 2018
A full size bed is also known as a double bed. The sheet measurements vary slightly between US and UK.  In the US a flat sheet for a full size bed would be 221cm x 259cm. A fâ¦itted sheet would be 137cm x 193cm x 20cm.  In the UK a flat sheet would be 220cm x 260cm and a fitted sheet would be 135cm x 190cm x 20cm.
A full-size futon mattress is the most readily available size, measuring 54 inches wide and 75 inches long -- exactly the same as a full or double bed mattress. This size of futon mattress is what's typically found on the sofa-style futons that fold down into a bed. A queen-sized futon mattress is also a fairly common size, measuring 60 inches wide, 80 inches long, just like any other standard queen-sized mattress. Some futon sofas use queen-sized futon mattresses; these are a bit wider than the full-sized futon sofa frames since the cushions are wider as well.