What distinguishes it
The US Full is also sold as a Double; the market label prevents confusion with the UK Double.
It is 15 inches wider than a US Twin and 7 inches narrower than a US Queen using this sourced convention.
53 × 75 in
Metric134.6 cm × 190.5 cm
Imperial53 in × 75 in
Surface area2.56 m²
Market aliases: Double.
+38.1 cm width · -12.7 cm length · +30.8% area
The area percentage uses US Twin XL as its denominator. It is 15 inches wider than a US Twin and 7 inches narrower than a US Queen using this sourced convention. That difference can change whether a rigid frame opening or fitted bedding matches.
Not the same worldwide
A UK Double is 3.8 mm wider on nominal figures and has the same 190.5 cm exact converted length to rounding.
Evidence type: convention · bounded 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 convention; some sellers publish 54-inch nominal width.
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 comparisonUS Full vs Queen mattress size
Queen is seven inches wider and five inches longer using the sourced US conventions in this dataset.
Curated comparisonUK Double vs US Full mattress sizeUK Double is 3.8 mm wider; the exact-converted US Full is 5 mm longer.
Related US recordUS Twin XLIt adds 5 inches of length without adding width.
Related US recordUS QueenIt is 7 inches wider and 5 inches longer than this dataset’s sourced US Full convention.
Related UK recordUK DoubleIt is 15 cm wider than a UK Small Double and 15 cm narrower than a UK King.
Evidence for this answer
- Better Sleep Council — Mattress SizesChecked 27 August 2026. Minimum factual dimensions only; original wording, tables and visuals.
Correction route: If a current source or product specification conflicts with this page, send the page URL and evidence through the corrections process.