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Bed and mattress sizes by country
Pick a country to see its mattress sizes in centimetres and inches. Every figure says where it comes from, and figures converted from the other unit are marked. Measure your frame before you buy: makers' sizes can differ slightly from these.
Sizes by country
United States
| Size name | Centimetres (w × l) | Inches (w × l) | Source type |
|---|---|---|---|
| Twin | 96.5 × 190.5 cmconverted | 38 × 75 in | Review site |
| Twin XL | 96.5 × 203.2 cmconverted | 38 × 80 in | Review site |
| FullSome charts list it 53 in wide. | 137.2 × 190.5 cmconverted | 54 × 75 in | Review site |
| Queen | 152.4 × 203.2 cmconverted | 60 × 80 in | Review site |
| King | 193 × 203.2 cmconverted | 76 × 80 in | Review site |
| California King | 182.9 × 213.4 cmconverted | 72 × 84 in | Review site |
Source: Sleep Foundation size guide (a review site with shop links), updated 11 July 2025. Checked 2026-10-28. Figures in the source's unit; the other unit is converted (centimetres to one decimal).
United Kingdom
| Size name | Centimetres (w × l) | Inches (w × l) | Source type |
|---|---|---|---|
| Small Single | 75 × 190 cm | 29.5 × 75 inconverted | Consumer body |
| Single | 90 × 190 cm | 35.5 × 75 inconverted | Consumer body |
| Small Double | 120 × 190 cm | 47 × 75 inconverted | Consumer body |
| Double | 135 × 190 cm | 53 × 75 inconverted | Consumer body |
| KingAbout the size of a US Queen, not a US King. | 150 × 200 cm | 59 × 78.5 inconverted | Consumer body |
| Super King | 180 × 200 cm | 71 × 78.5 inconverted | Consumer body |
Source: Which? size guide, May 2026 (Which? is a UK consumer organisation). Checked 2026-10-28. Figures in the source's unit; the other unit is converted (inches to the nearest half inch).
Canada
Canada uses the same inch sizes as the US, according to one mattress brand. "Full" is also sold as "Double".
| Size name | Centimetres (w × l) | Inches (w × l) | Source type |
|---|---|---|---|
| Twin | 96.5 × 190.5 cmconverted | 38 × 75 in | Brand blog |
| Twin XL | 96.5 × 203.2 cmconverted | 38 × 80 in | Brand blog |
| Full / DoubleSome charts list it 53 in wide. | 137.2 × 190.5 cmconverted | 54 × 75 in | Brand blog |
| Queen | 152.4 × 203.2 cmconverted | 60 × 80 in | Brand blog |
| King | 193 × 203.2 cmconverted | 76 × 80 in | Brand blog |
| California King | 182.9 × 213.4 cmconverted | 72 × 84 in | Brand blog |
Source: Amerisleep blog (a mattress brand), April 2026: Canada uses the same inch sizes as the US. Figures shown are the US ones. Checked 2026-10-28. Figures in the source's unit; the other unit is converted (centimetres to one decimal).
Australia
Australia has no official mattress-size standard, and sizes vary by brand by a few centimetres. Where shops disagree we show the range. Check the listing.
| Size name | Centimetres (w × l) | Inches (w × l) | Source type |
|---|---|---|---|
| SingleRange: shops differ. | 90–92 × 188 cm | 35.5–36 × 74 inconverted | Retailer |
| King Single | 107 × 203 cm | 42 × 80 inconverted | Retailer |
| Double | 138 × 188 cm | 54.5 × 74 inconverted | Retailer |
| QueenRange: shops differ. | 152–153 × 203 cm | 60 × 80 inconverted | Retailer |
| King | 183 × 203 cm | 72 × 80 inconverted | Retailer |
| Super KingOne retailer source (Bedworld). | 203 × 203 cm | 80 × 80 inconverted | One retailer source |
Source: Retailer size guides: Factory Buys; Tempur (Single and Queen widths); Bedworld (Super King). Checked 2026-10-28. Figures in the source's unit; the other unit is converted (inches to the nearest half inch).
New Zealand
New Zealand has no official mattress-size standard, and sizes vary by brand by a few centimetres. Where shops disagree we show the range. Check the listing.
| Size name | Centimetres (w × l) | Inches (w × l) | Source type |
|---|---|---|---|
| Single | 91 × 188 cm | 36 × 74 inconverted | Retailer |
| King Single | 107 × 203 cm | 42 × 80 inconverted | Retailer |
| DoubleRange: shops differ. | 137–139 × 188 cm | 54–54.5 × 74 inconverted | Retailer |
| Queen | 153 × 203 cm | 60 × 80 inconverted | Retailer |
| KingRange: shops differ. | 165–168 × 203 cm | 65–66 × 80 inconverted | Retailer |
| Super King | 183 × 203 cm | 72 × 80 inconverted | Retailer |
| California King | Not verified yet | Check the listing | |
Source: derlook size guide (a retailer), July 2024; ranges where other New Zealand retailers differ. Checked 2026-10-28. Figures in the source's unit; the other unit is converted (inches to the nearest half inch).
Ireland
One Irish retailer says Irish sizes match the UK ones. We found no consumer body or standard to confirm it.
| Size name | Centimetres (w × l) | Inches (w × l) | Source type |
|---|---|---|---|
| Small Single | 75 × 190 cm | 29.5 × 75 inconverted | Retailer |
| Single | 90 × 190 cm | 35.5 × 75 inconverted | Retailer |
| Small Double | 120 × 190 cm | 47 × 75 inconverted | Retailer |
| Double | 135 × 190 cm | 53 × 75 inconverted | Retailer |
| KingAbout the size of a US Queen, not a US King. | 150 × 200 cm | 59 × 78.5 inconverted | Retailer |
| Super King | 180 × 200 cm | 71 × 78.5 inconverted | Retailer |
Source: beds.ie size guide (a retailer), June 2026: Irish sizes are the same as UK sizes. Not an official standard. Checked 2026-10-28. Figures in the source's unit; the other unit is converted (inches to the nearest half inch).
Convert a size between countries
Choose the size you know and the country you are buying in. We compare centimetres, not names, and only use sizes we have figures for.
Same name, different size
These names are used in more than one country for mattresses that differ by 3 cm or more in width. Canada and Ireland are left out because their sources say they use the US and UK sizes.
| Name | Where | Centimetres | Inches |
|---|---|---|---|
| King | United States | 193 × 203.2converted | 76 × 80 |
| United Kingdom | 150 × 200 | 59 × 78.5converted | |
| Australia | 183 × 203 | 72 × 80converted | |
| New Zealand | 165–168 × 203 | 65–66 × 80converted | |
| Double | United Kingdom | 135 × 190 | 53 × 75converted |
| Australia | 138 × 188 | 54.5 × 74converted | |
| New Zealand | 137–139 × 188 | 54–54.5 × 74converted | |
| Super King | United Kingdom | 180 × 200 | 71 × 78.5converted |
| Australia | 203 × 203 | 80 × 80converted | |
| New Zealand | 183 × 203 | 72 × 80converted |
The one to remember: a UK King (150 × 200 cm) is close to a US Queen (60 × 80 in, about 152 × 203 cm), not a US King (76 × 80 in, about 193 × 203 cm). Go by the centimetres when you order a frame or fitted sheets.
Where these numbers come from
We checked these on 2026-10-28. We did not find a size table from a standards body or trade association for any of the six countries, so each figure carries the kind of source it comes from:
- UK: Which?, a consumer organisation (size guide, May 2026).
- US: Sleep Foundation, a review site that earns from shop links (size guide, July 2025). Some charts give the Full as 53 in wide instead of 54.
- Canada: a mattress brand's blog saying Canada uses the US inch sizes; we show the US figures.
- Ireland: an Irish retailer saying Irish sizes match the UK's; not an official standard.
- Australia and New Zealand: retailer guides. There is no official standard and sizes vary by brand by a few centimetres, so we show ranges where shops disagree. The Australian Super King comes from one retailer only.
Each table keeps the unit its source used; the other unit is converted and marked "converted". Not verified yet, and so shown without numbers: the New Zealand California King.
Not sure which size suits you? The chooser asks who shares the bed and suggests one.