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What are UK King mattress dimensions?
In short
A UK King mattress is typically 150 cm wide by 200 cm long (about 59.1 × 78.7 inches). It is longer than a UK Double (190 cm) and narrower than many EU King sizes near 160 × 200 cm.
More detail
UK King is a domestic retail size, not a global ISO standard. Super King is usually 180 × 200 cm. Confirm centimetres before pairing frames or sheets.
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Updated 2026-08-03. All answers