What distinguishes it
The principal UK Single convention in this reference.
It is 15 cm wider than Small Single and 30 cm narrower than Small Double.
90 × 190 cm
Metric90 cm × 190 cm
Imperial35.43 in × 74.8 in
Surface area1.71 m²
Market aliases: 3ft Single.
+15.0 cm width · 0.0 cm length · +20.0% area
The area percentage uses UK Small Single as its denominator. It is 15 cm wider than Small Single and 30 cm narrower than Small Double. That difference can change whether a rigid frame opening or fitted bedding matches.
Not the same worldwide
A US Twin is 6.5 cm wider and approximately 0.5 cm longer after exact conversion.
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
Related UK recordUK Small Single
It is 15 cm narrower than a UK Single while keeping the same nominal length.
Related UK recordUK Small DoubleIt is 30 cm wider than a UK Single and 15 cm narrower than a UK Double.
Related US recordUS TwinIt shares its 38-inch width with Twin XL but is 5 inches shorter.
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.