Full / double bed covers
Updated August 2026
Full is the size the industry keeps trying to merge into queen. Half the covers on the market are labeled "full/queen" and cut for the queen, which is why so many full beds end up under something that hangs to the floor on both sides.
Exact dimensions
| Item | Dimensions | Notes |
|---|---|---|
| Full / double mattress | 54×75" | Same length as a twin, 16" wider |
| Full duvet cover (sold alone) | 80×90" | The true full cut; harder to find than it should be |
| Full/queen duvet cover | 90×90" | Cut for the queen; generous on a full |
| Full comforter | 80×90" | Often shares a SKU with the queen at 90×90" |
| Queen mattress (for comparison) | 60×80" | 6" wider, 5" longer |
| Twin mattress (for comparison) | 38×75" | Same 75" length |
Read the inches on the listing, not the word on the package. A cover described as "full/queen" is almost always 90×90", and that is a different garment from an 80×90" full. Every size and its regional equivalents are collected in the duvet cover size chart.
The drop math, worked out
Start with a true full cover:
(80" cover − 54" mattress) ÷ 2 = 13" of drop per side.
Then subtract the mattress height to see what falls below the mattress:
| Mattress height | 80" cover: drop per side | Hangs below | 90" cover: hangs below |
|---|---|---|---|
| 8" | 13" | 5" | 10" |
| 10" | 13" | 3" | 8" |
| 12" | 13" | 1" | 6" |
| 14" | 13" | −1" (stops short of the base) | 4" |
| 16" with topper | 13" | −3" | 2" |
The full/queen column comes from the same formula with a wider cover: (90 − 54) ÷ 2 = 18" per side, so a 14" mattress still leaves 4" hanging. That inverts the usual advice. On a full, the "wrong" oversized cover is often the right buy — a true 80" full cover only looks tailored on a mattress 10" deep or less.
Length is the same on both: 90" of cover over 75" of mattress leaves 15" spare. Keep 5" folded at the head and 10" remains at the foot, which is shorter than a 12" mattress is tall. Pull the cover toward the foot and let shams fill the head end.
Full and queen are not interchangeable
Six inches of width and five of length sound trivial and are not. The fitted sheet is the hard stop: a queen fitted sheet on a full mattress has 6" of slack across and 5" along, so it balloons in the middle and unhooks at the corners, and a full fitted sheet on a queen simply will not stretch. Mattress pads fail the same way.
The top layer is more forgiving in one direction only. A queen cover on a full is over-sized but wearable: 18" per side and 17" of extra length that puddles at the foot. A full cover on a queen is not: (80 − 60) ÷ 2 = 10" per side, which on a 14" mattress does not even reach the bottom of the mattress, let alone the frame. If your bed is the larger one, the numbers are worked through in queen bed covers. Going the other way, twin bed covers shares the full's 75" length, and the whole ladder is on the sizes hub.
Deep mattresses and toppers
Boxed hybrids arrive at 12–14" as standard now, and a 2–3" topper on top of that is common in guest rooms. On a full that combination consumes the entire 13" drop of a true full cover. The fixes, in order of cost: buy the 90×90" full/queen cut instead, add a bed skirt with a 14–15" drop to cover the gap, or switch the top layer to a comforter, which carries its loft to the edge and reads fuller than an empty cover over a thin insert. The same problem at the other end of the size range is the whole subject of oversized king bedding.
What to buy for a full
Fulls do double duty as guest beds and single-sleeper primary beds, which points toward mid-weight, low-maintenance fabric: cotton percale at 200–400 thread count and 110–140 GSM for something crisp that takes a 140°F/60°C wash, or sateen at 300–600 thread count and 120–170 GSM if you want the drape and the slight sheen. Corner ties matter because a full insert has enough room to migrate.
- Best duvet covers — our overall ranking, with the sizes each brand actually stocks.
- Best cotton duvet covers — the default fiber for a bed that gets washed weekly.
- Best comforter sets — full-size sets that include shams, which fulls often need to fill the head end.
Questions people actually ask
Is a full the same as a double bed?
In the United States, yes. Full and double are two names for the same 54×75" mattress. In the UK a double is 54×75" as well, but UK duvet sizing is metric and a UK double duvet is roughly 78×78", which is squarer and narrower than the US 80×90" cover.
Can I use queen bedding on a full bed?
The top layer can work. A 90" wide queen cover on a 54" full gives 18" of drop per side, which is generous rather than wrong, though the extra 17" of length puddles at the foot. The fitted sheet cannot: a queen mattress is 6" wider and 5" longer, so a queen fitted sheet will not stay on a full.
What size duvet cover fits a full bed?
An 80×90" cover when full is sold on its own, or a 90×90" cover under the combined full/queen label. The 80" version gives 13" of drop per side and looks tailored; the 90" version gives 18" and looks fuller, which suits a mattress 12" deep or more.
Why does my full comforter look too short at the foot?
A 90" cover on a 75" mattress has 15 spare inches of length. Fold five back at the head for pillows and ten remain at the foot, which is less than the height of a 12" mattress, so the bottom corner stays exposed. Pull the cover down toward the foot and use pillow shams to fill the gap at the head.