What distinguishes it
The standard UK Double; its name overlaps with the US Full/Double label.
It is 15 cm wider than a UK Small Double and 15 cm narrower than a UK King.
135 × 190 cm
Metric135 cm × 190 cm
Imperial53.15 in × 74.8 in
Surface area2.56 m²
Market aliases: 4ft 6in.
+15.0 cm width · 0.0 cm length · +12.5% area
The area percentage uses UK Small Double as its denominator. It is 15 cm wider than a UK Small Double and 15 cm narrower than a UK King. That difference can change whether a rigid frame opening or fitted bedding matches.
Not the same worldwide
It is almost the same width as the sourced 53-inch US Full, but the market and product specification still matter.
Evidence type: convention · high confidence.
Before ordering
A named size is not a fit guarantee. Compare the seller’s finished width, length and stated tolerance with the frame opening and bedding specification.
Published tolerance: Nominal UK convention; verify the finished product.
Measure the finished mattress and the frame’s internal opening. Measure the mattress correctly and check which frame dimension controls fit.
Continue this decision
Curated comparisonUK Double vs King bed size
The extra length is as important as the width when checking a bedstead or fitted sheet.
Curated comparisonUK Double vs US Full mattress sizeUK Double is 3.8 mm wider; the exact-converted US Full is 5 mm longer.
Related UK recordUK Small DoubleIt is 30 cm wider than a UK Single and 15 cm narrower than a UK Double.
Related UK recordUK KingIt adds 15 cm width and 10 cm length over a UK Double.
Related US recordUS FullIt is 15 inches wider than a US Twin and 7 inches narrower than a US Queen using this sourced convention.
Evidence for this answer
- Dreams — The bed and mattress size guideChecked 27 August 2026. Retailer evidence used for dimensions and naming only.
- Which? — UK bed sizes: bed and mattress size guideChecked 27 August 2026. Independent corroboration; no protected prose, tables or imagery reproduced.
Correction route: If a current source or product specification conflicts with this page, send the page URL and evidence through the corrections process.