Full bed frames, sized 54 by 75 inches
A full mattress measures 54 by 75 inches, which is 16 inches wider than a twin and 6 inches narrower than a queen. It suits a single adult who wants room to spread out, a guest room, or a smaller bedroom where a queen would leave no walking space around the foot of the bed.
Platform, storage and trundle
Platform frames carry the mattress on closely spaced slats, so no box spring is needed and the bed sits low. Storage frames add side drawers or a lift-up deck. Trundle frames pull a second twin mattress out from underneath, which is what makes a full frame work in a shared or guest room without a second bed taking floor space.
Measuring the room
A full frame occupies more floor than the mattress alone, usually 2 to 4 inches on each side depending on the headboard and rails. Leave at least 24 inches of walking space on the sides you use, and check headboard height against anything mounted on the wall behind it.
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