Furniture · Reference
Standard US mattress sizes are Twin 38×75 in, Full 54×75, Queen 60×80, King 76×80 and California King 72×84 in. UK sizes are metric and differ: Single 90×190 cm, Double 135×190, King 150×200 and Super King 180×200 cm.
Mattresses are specified by width × length. Height (profile) is not standardized.
| Size | Width | Length |
|---|---|---|
| Twin | 38 in / 96.5 cm | 75 in / 190.5 cm |
| Twin XL | 38 in / 96.5 cm | 80 in / 203 cm |
| Full (Double) | 54 in / 137 cm | 75 in / 190.5 cm |
| QueenMost popular US size | 60 in / 152 cm | 80 in / 203 cm |
| King | 76 in / 193 cm | 80 in / 203 cm |
| California King | 72 in / 183 cm | 84 in / 213 cm |
Source: Sleep Foundation — Mattress Sizes and Dimensions Guide (2025)
| Size | Width | Length |
|---|---|---|
| Single | 90 cm / 3'0" | 190 cm / 6'3" |
| Small Double | 120 cm / 4'0" | 190 cm / 6'3" |
| Double | 135 cm / 4'6" | 190 cm / 6'3" |
| King | 150 cm / 5'0" | 200 cm / 6'6" |
| Super King | 180 cm / 6'0" | 200 cm / 6'6" |
Source: Dreams — The Mattress Size Guide (UK & European bed sizes)
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Queen, at 60 × 80 inches (152 × 203 cm) per Sleep Foundation — the most popular US size, giving two sleepers about 30 in of width each.
No. A UK King is 150 × 200 cm (~59 × 79 in), while a US King is 76 × 80 in (193 × 203 cm) — much wider. A UK King is closest to a US Queen in width.
A standard King is 76 × 80 in (193 × 203 cm); a California King is 72 × 84 in (183 × 213 cm) — 4 in narrower but 4 in longer, suited to taller sleepers.
No. EU sizes are typically 200 cm long (e.g. EU Single 90×200, EU Double 140×200, EU King 160×200 cm), whereas UK Single and Double are 190 cm long.
Not necessarily. Only width and length are standardized; profile/thickness varies widely by model, so buyers should confirm depth for fitted sheets and bed frames.
Every figure on this page is traced to a named source, linked under each table. Standard sizes come from published standards and established industry references; where a size is a typical range or varies by manufacturer, we say so. Sizes vary by region, model and revision — treat these as the standard reference, and confirm the exact spec of the item you are selling.
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