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US Mattress Sizes vs UK

Published 2026-08-03. Last updated 2026-08-03. Desk research by Kaiser Khan — we have not product-tested US mattress sizes. This is not a shop review and not medical advice.

In short

US mattress names do not match UK footprints. Typical sizes include Twin at about 97 × 191 cm, Full 137 × 191 cm, Queen 152 × 203 cm and King 193 × 203 cm. A US Queen is near UK King width but longer. A US King is wider than a UK Super King. Compare centimetres, not names alone.

About 1 minutes to read

Spacious bedroom with a large king size upholstered bed and clear walkways
Size is about width, length and walkway space — not only the name on the label.
Dimensions (centimetres and inches)
Size name Width (cm) Length (cm) Width (in) Length (in)
Twin 97 191 38 75
Twin XL 97 203 38 80
Full (Double) 137 191 54 75
Queen 152 203 60 80
King 193 203 76 80
California King 183 213 72 84

Name mix-ups that cause returns

US name Typical cm Nearest UK name UK typical cm
Twin 97 × 191 Single 90 × 190
Full 137 × 191 Double 135 × 190
Queen 152 × 203 King 150 × 200
King 193 × 203 Super King 180 × 200
California King 183 × 213 (no exact UK twin) —

How it works

Comparison chart of US Twin through California King mattress footprints with centimetre labels
US size names are a separate system from UK Single–Super King. Compare centimetres, not marketing names.

Frequently asked questions

Is a US Queen the same as a UK King?

Close in width but not identical. A US Queen is about 152 × 203 cm. A UK King is typically 150 × 200 cm. Sheets and frames labelled for one market may not fit the other cleanly.

Is a US King bigger than a UK Super King?

Yes in width. A US King is about 193 × 203 cm. A UK Super King is typically 180 × 200 cm. California King trades some width for extra length.