Queen size beds are 60 inches wide and 80 inches long. Double beds, also called full size beds, are slightly smaller at 54 inches wide and 75 inches long.
A queen size flat sheet can fit on any smaller bed, since it can be tucked in. However, fitted sheets best fit the specific mattress size provided on the label. A queen size fitted sheet may fit too loosely on a double bed.Learn more about Home & Garden