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Measure before you buy
Compare beds to scale, then check the walking space in your room.
United States · standard and specialty
Mattress width comes first. Dimensions are nominal retail sizes; individual makers can vary by about an inch.
One scale · width × length
Every outline uses the same scale
Crib / Toddler28 × 52 in
Twin38 × 75 in
Twin XL38 × 80 in
Full / Double54 × 75 in
Full XL54 × 80 in
Queen60 × 80 inSplit Queen shares this footprint
Olympic Queen66 × 80 in
King76 × 80 inSplit King shares this footprint
California King72 × 84 inSplit Cal King shares this footprint
Wyoming King84 × 84 in
Texas King80 × 98 in
Alaskan King108 × 108 in
| Size | Inches | Centimetres | Area | Suggested room | Best for | Use in comparison |
|---|---|---|---|---|---|---|
| Crib | 28 × 52 | 71 × 132 | 10.1 ft² | — | Infants 0–18 months | |
| Toddler | 28 × 52 | 71 × 132 | 10.1 ft² | — | Ages 18 months–5 years; crib footprint | |
| Twin Single | 38 × 75 | 96.5 × 190.5 | 19.8 ft² | 7 × 10 ft | Kids, solo sleepers, bunks | |
| Twin XL | 38 × 80 | 96.5 × 203 | 21.1 ft² | 8 × 10 ft | Tall solo sleepers, college dorms | |
| Full Double | 54 × 75 | 137 × 190.5 | 28.1 ft² | 9 × 10.5 ft | Solo adults; snug for two | |
| Full XL | 54 × 80 | 137 × 203 | 30 ft² | 9.5 × 10.5 ft | Taller solo sleepers, dorms | |
| Queen | 60 × 80 | 152.5 × 203 | 33.3 ft² | 10 × 10 ft | Couples; spacious for one | |
| Olympic Queen Specialty | 66 × 80 | 167.5 × 203 | 36.7 ft² | 10 × 10 ft | Extra width for couples; some RVs | |
| Split Queen Specialty | 60 × 80 | 152.5 × 203 | 33.3 ft² | 10 × 10 ft | Adjustable bases; two 30 × 80 halves | |
| King Eastern King | 76 × 80 | 193 × 203 | 42.2 ft² | 12 × 12 ft | Couples wanting maximum width | |
| California King Western King | 72 × 84 | 183 × 213.5 | 42 ft² | 12 × 12 ft | Tall sleepers; long, narrow rooms | |
| Split King | 76 × 80 | 193 × 203 | 42.2 ft² | 12 × 12 ft | Two Twin XLs; independent sides | |
| Split California King Specialty | 72 × 84 | 183 × 213.5 | 42 ft² | 12 × 12 ft | Independent adjustable 36 × 84 sides | |
| Wyoming King Specialty | 84 × 84 | 213 × 213 | 49 ft² | 12 × 12 ft | Oversized; couples with kids or pets | |
| Texas King Specialty | 80 × 98 | 203 × 249 | 54.4 ft² | 12 × 14 ft | Very tall sleepers; longest specialty size | |
| Alaskan King Specialty | 108 × 108 | 274 × 274 | 81 ft² | 16 × 16 ft | Whole-family co-sleeping; largest size |
Specialty Standard frames and bedding may be hard to find. Room sizes are practical guidance, not building rules.
Typical US retail sizes
Bedding varies more than mattresses. Treat these as shopping ranges and check the package before buying.
Measure the mattress plus any topper. Standard pockets are typically 7–14 in deep; deep pockets start around 15 in.
Same name, different mattress
US names are not universal. Switch the sizing standard before comparing a mattress sold in another market.
Worked example
A King (76 × 80 in / 193 × 203 cm) is 16 inches wider than a Queen (60 × 80 in / 152.5 × 203 cm) — about 8 inches more per person and 27% more mattress area, at the same length.
In an empty 12 × 12 ft room the King mattress footprint leaves ~34 in on each side and 64 in at the foot. In 10 × 10 ft, the narrowest gap is ~22 in — below the 24 in walking-clearance guidance, before adding a frame, doors or furniture.
One-minute check
Straight answers
In the US, Queen (60 × 80 in / 152.5 × 203 cm) — roughly half of all mattresses sold. It suits couples and solo sleepers who want room; its mattress footprint has comfortable empty-room clearance in a 10 × 10 ft room.
A King is 16 in wider (76 vs 60), the same 80 in long — about 8 in more shoulder room per person and ~27% more area. It needs a wider room (12 ft+). Compare them to scale above.
Almost the same area. A standard King is 4 in wider; a California King is 4 in longer (better for sleepers over 6 ft and for long, narrow rooms).
Aim for about 24–30 in of open walking space on each usable side. A Queen mattress footprint is commonly guided toward ~10 × 10 ft; a King toward ~12 × 12 ft. Fit a room estimates an empty rectangle with the mattress centered at one wall—it does not model the frame, doors or furniture, so measure those before buying.
No. A UK King (150 cm) is narrower than a US King (193 cm) — closer to a US Queen. An EU King (160 cm) sits between them, and an AU King (183 cm) matches a US California King's width. Switch sizing standards above to compare.
Match the mattress width × length, then its height to the fitted-sheet pocket depth. For mainstream US sizes, the tool shows typical retail ranges. For UK, EU, Australian and specialty beds, shop by the exact dimensions shown and confirm the maker's label; bedding names and sizes vary by brand and country.
Method
Last reviewed July 19, 2026. Dimensions are cross-checked against mattress makers and standards bodies (ISPA in the US, NBF in the UK, plus IKEA and Australian retailers). Sizes are nominal and actual products can vary by about an inch. Bedding is less standardized: US figures here are typical retail ranges; elsewhere, use the exact mattress dimensions and verify the maker. Room fit uses only the mattress footprint in an empty rectangle, not the outer frame, doors or furniture. Nothing is stored or uploaded; the tool runs in your browser.