sizing comparison
Double vs King size
Evergreen URL: /compare/double-vs-king-size-bed
In short
A UK Double mattress is 135 × 190 cm. A UK King is 150 × 200 cm, so it is 15 cm wider and 10 cm longer. Two people get 67.5 cm each on a Double and 75 cm each on a King. Choose by room space, height and how many sleepers. Check centimetres, not names.
This comparison is about UK plan sizes, not brands. Double and King are both common choices for couples. The King adds width and length, but it also needs more floor space and bigger bedding.
What is the difference between Double and King size?
A UK Double mattress is 135 × 190 cm. A UK King is 150 × 200 cm, so it is 15 cm wider and 10 cm longer. Two people get 67.5 cm each on a Double and 75 cm each on a King. Choose by room space, height and how many sleepers. Check centimetres, not names.
| Criterion | Double | King size |
|---|---|---|
| Mattress size | 135 × 190 cm | 150 × 200 cm |
| Shop name | 4ft 6 | 5ft |
| Width per person (two adults) | 67.5 cm each | 75 cm each |
| Length | 190 cm (about 6ft 3) | 200 cm (about 6ft 6) — 10 cm longer |
| Mattress area | About 2.57 m² | About 3.00 m² — about 17% more |
| Room size with 50–60 cm walkways on both sides and at the foot | About 235–255 cm wide × 240–250 cm long | About 250–270 cm wide × 250–260 cm long |
| Bedding | Double sheets and duvets | King sheets and duvets — not interchangeable |
| Common mix-up | Not the same as an EU Double (140 × 200 cm) | Narrower than many EU Kings (160 × 200 cm) |
Who is Double for — and who should skip it?
- One sleeper who wants more width than a Single
- Two sleepers in a room too small for a King
- You already own Double bedding and a 190 cm frame
Who is King size for — and who should skip it?
- Two adults who want more width each
- Anyone who finds 190 cm too short
- The room can take about 250 cm of width with walkways
Frequently asked questions
How much bigger is a King than a Double?
A UK King is 15 cm wider and 10 cm longer than a UK Double. That adds about 0.43 m² of sleeping area, which is about 17% more.
Is a Double big enough for two people?
It can work, but each person gets 67.5 cm. That is less than a UK Single at 90 cm. A King gives 75 cm each and 10 cm more length.
Will Double sheets fit a King mattress?
No. Double sheets are cut for 135 × 190 cm. A King needs sheets cut for 150 × 200 cm. Match the fitted sheet pocket to the mattress depth as well.
How much room do I need for a King size bed?
With about 50–60 cm to walk on both sides and at the foot, plan for a room roughly 250–270 cm wide and 250–260 cm long, plus any extra frame size.