Why this pair matters
Both are 200 cm long, so Super King’s difference is a 30 cm increase in width.
The figures above are calculated from the identified dimensional records, not from rounded display conversions.
UK King is 30.0 cm narrower and 0.0 cm longer than UK Super King.
The calculated surface-area difference is 16.7%, measured relative to UK Super King.
Width A − B-30.0 cm
Length A − B0.0 cm
Area A − B-16.7%
Dimensions side by side
| Market + name | Native figure | Centimetres | Inches | Evidence type |
|---|---|---|---|---|
| UK KingAlso: 5ft King | 150 × 200 cm | 150 cm × 200 cm | 59.06 in × 78.74 in | conventionhigh confidence |
| UK Super KingAlso: 6ft Super King | 180 × 200 cm | 180 cm × 200 cm | 70.87 in × 78.74 in | conventionhigh confidence |
Compatibility decision
Super King requires a wider opening and different fitted bedding; its nominal length does not increase.
Rigid frames, enclosed bases, fitted sheets and protectors should be selected from finished product measurements and depth—not from the closest name.
Check the underlying records
Review UK King dimensions and tolerance · Review UK Super King dimensions and tolerance · Compare another country-qualified pair · Measure before buying
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.