UK Mattress Size Guide
UK mattress sizes are standardised, but the names can be confusing and they differ from European and US sizing. Here is every standard UK size, what it measures, and who it suits.
Standard UK mattress sizes
| Name | Imperial | Metric (W × L) | Best for |
|---|---|---|---|
| Small Single | 2'6" | 75 × 190 cm | Young children, box rooms |
| Single | 3'0" | 90 × 190 cm | Children, single adults, guest rooms |
| Small Double | 4'0" | 120 × 190 cm | Solo sleepers wanting more room, smaller doubles |
| Double | 4'6" | 135 × 190 cm | Couples in average-sized rooms |
| King | 5'0" | 150 × 200 cm | Couples wanting more width and length |
| Super King | 6'0" | 180 × 200 cm | Couples wanting maximum space, taller sleepers |
Note that King and Super King are 10 cm longer (200 cm) than Single, Small Double and Double (190 cm) — worth checking if anyone in the bed is over about 6 feet tall.
How to choose the right size
- Measure the room, not just the bed. Leave at least 60–70 cm of walking space on any side you need to access.
- Two adults? A Double gives each person roughly the width of a cot. If space allows, a King or Super King dramatically improves sleep quality for couples.
- Check the frame and bedding. Your mattress size must match your bed frame or divan, and fitted sheets are sold by these same size names.
- Doorways and stairs. Larger mattresses can be hard to manoeuvre. Rolled mattresses solve this — they arrive vacuum-packed and expand in the room.
Frequently asked questions
What is the most popular UK mattress size?
The Double (135 × 190 cm) is the most common size for couples in average-sized UK bedrooms, while the King (150 × 200 cm) is the fastest-growing upgrade choice.
Are UK and European mattress sizes the same?
No. A UK King is 150 × 200 cm, whereas a European King (EU size) is typically 160 × 200 cm. Always buy bedding to match the exact size standard of your mattress.
How much bigger is a Super King than a King?
A Super King (180 × 200 cm) is 30 cm wider than a King (150 × 200 cm) but the same length. That extra width is roughly the space of a small child.