What distinguishes it
The compact US adult-size starting point in this V1 reference.
It shares its 38-inch width with Twin XL but is 5 inches shorter.
38 × 75 in
Metric96.5 cm × 190.5 cm
Imperial38 in × 75 in
Surface area1.84 m²
Market aliases: Single.
0.0 cm width · -12.7 cm length · -6.3% area
The area percentage uses US Twin XL as its denominator. It shares its 38-inch width with Twin XL but is 5 inches shorter. That difference can change whether a rigid frame opening or fitted bedding matches.
Not the same worldwide
A UK Single is narrower by 2.6 inches and approximately the same nominal length.
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 convention; check the model specification.
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 Twin vs Twin XL mattress size
Twin XL adds length only; a Twin frame or fitted sheet should not be assumed to accept it.
Related US recordUS Twin XLIt adds 5 inches of length without adding width.
Related UK recordUK SingleIt is 15 cm wider than Small Single and 30 cm narrower than Small Double.
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.