Bed sheet sizes and duvet sizes by bed size
A US fitted sheet is sold under the same size name as the mattress it fits: a Queen fitted sheet is 60 × 80 in, the same as a Queen mattress. A US flat sheet is larger: Sleep Foundation lists a Queen flat sheet at 92 × 108 in. In the UK, beds take a duvet, not a flat sheet: a UK Double duvet is 200 × 200 cm. Every US and UK size is below, with what each one hangs over the mattress.
What we found
A fitted sheet is not a flat sheet, and neither is a duvet
"Sheet sizes" and "deep pocket sheets" searches mostly want one of three different things: the fitted sheet (cut to the mattress, and covered by pocket depth, not this page), the flat sheet (a bigger rectangle with no elastic, tucked or folded over), or, in the UK, a duvet, which most US bedrooms do not use in the same way. None of the three is interchangeable with another, and Twin XL has no separately published flat sheet size in our source, only the Twin figure.
US fitted and flat sheet sizes
Fitted sheet figures are the mattress size itself (see the bed size chart). Flat sheet figures are Sleep Foundation's bed sheet sizes guide, read 2026-09-26.
| Size | Fitted sheet | Flat sheet |
|---|---|---|
| Twin | 39 × 75 in | 72 × 102 in |
| Twin XL | 39 × 80 in | not published separately |
| Full | 54 × 75 in | 96 × 102 in |
| Queen | 60 × 80 in | 92 × 108 in |
| King | 76 × 80 in | 110 × 114 in |
| California King | 72 × 84 in | 111 × 114 in |
Fitted: mattress size, Target, checked 2026-09-24. Flat: Sleep Foundation, checked 2026-09-26. Twin XL's flat sheet is not listed separately from Twin in this source, so we show it as not published rather than reusing the Twin figure for a longer mattress.
| Measure | Queen mattress | Queen flat sheet | Change |
|---|---|---|---|
| Width | 60 in152.4 cm | 92 in233.7 cm | +32 in+81.3 cm |
| Length | 80 in203.2 cm | 108 in274.3 cm | +28 in+71.1 cm |
| Area | 4,800 sq in33.3 sq ft | 9,936 sq in69.0 sq ft | +5,136 sq in+107.0% |
| Area (m²) | 3.10 m² | 6.41 m² | +3.31 m² |
US comforter (duvet insert) sizes
US bedding is usually a comforter, not a duvet with a separate cover, though a comforter and a duvet insert serve the same purpose. Parachute sells duvet covers sized to match: one Twin/Twin XL cover, one Full/Queen cover, and one King/Cal King cover.
| Size | Comforter (in) | Overhang per side |
|---|---|---|
| Twin | 66 to 68 × 86 to 90 | 13.5 to 14.5 in |
| Twin XL | 68 × 86 to 90 | 14.5 to 14.5 in |
| Full | 78 to 88 × 86 to 92 | 12 to 17 in |
| Queen | 86 to 90 × 90 to 100 | 13 to 15 in |
| King | 90 to 108 × 86 to 108 | 7 to 16 in |
| California King | 90 to 110 × 92 to 108 | 9 to 19 in |
Sleep Foundation comforter sizes, read 2026-09-25; the overhang is our arithmetic (comforter width minus mattress width, split over both sides). A side is covered only if the overhang is at least the mattress's depth.
UK fitted sheet, flat sheet and duvet sizes
UK bedrooms use a duvet inside a cover, plus a fitted sheet under it. Some also use a flat sheet between the sleeper and the duvet. Which? publishes all three for the four most common sizes.
| Size | Fitted sheet | Flat sheet | Duvet |
|---|---|---|---|
| Single | 90 × 190 cm | 180 × 260 cm | 135 × 200 cm |
| Double | 135 × 190 cm | 230 × 260 cm | 200 × 200 cm |
| King | 150 × 200 cm | 275 × 275 cm | 225 × 220 cm |
| Super King | 180 × 200 cm | 300 × 265 cm | 260 × 220 cm |
Which? bed, sheet and duvet sizes table, checked 2026-09-25. A UK Double duvet (200 × 200 cm) hangs 32.5 cm over each side of a 135 cm mattress.
Common questions
What size flat sheet do I need for a Queen bed?
A 92 × 108 in flat sheet, per Sleep Foundation. The mattress itself is 60 × 80 in; the flat sheet is larger so it can tuck at the sides and foot.
Is a duvet the same size as the mattress?
No. A duvet is meant to hang over the sides: a UK Double duvet is 200 × 200 cm against a 135 × 190 cm mattress, about 32 cm over each side. A US comforter works the same way; see the overhang column above.
What size sheet fits a Twin XL?
A Twin XL fitted sheet is 39 × 80 in, the mattress size itself. We have not found a Twin XL flat sheet size published separately from the Twin's 72 × 102 in in our source; check the specific sheet's listing before buying.
Do I need a deep pocket sheet?
That depends on your mattress's thickness, not its width and length. See fitted sheet pocket depth for a fit check against six published mattress depths.
Search bed sheet sets on AmazonThis is an affiliate link: Bed Size Chart may earn a commission from qualifying purchases, at no extra cost to you.
Search comforters on AmazonThis is an affiliate link: Bed Size Chart may earn a commission from qualifying purchases, at no extra cost to you.
Sources
- Target mattress size chart
- Sleep Foundation twin size guide
- Sleep Foundation bed sheet sizes
- Sleep Foundation comforter sizes
- Parachute percale duvet cover (size options)
- Which? bed, sheet and duvet sizes table
- Which? UK mattress size guide
Sources are grouped by the market they are written for. Each figure was checked against its source on the date shown.