UK bed sizes chart

UK beds are named by width in feet and sized in centimetres. Here is every standard size, smallest to largest.

Checked against UK retailer and maker guides on 21 October 2026.

UK bed sizes in order

Mattress sizes from Which?, BedGuide and MattressNextDay, which all agree
Size	Width	cm	Feet and inches
Small single	2ft 6in	75 × 190 cm	2ft 6in × 6ft 3in
Single	3ft	90 × 190 cm	3ft × 6ft 3in
Small double (4ft, “queen” or ¾)	4ft	120 × 190 cm	4ft × 6ft 3in
Double	4ft 6in	135 × 190 cm	4ft 6in × 6ft 3in
King	5ft	150 × 200 cm	5ft × 6ft 6in
Super king	6ft	180 × 200 cm	6ft × 6ft 6in
Emperor	6ft 6in	200 × 200 cm	6ft 6in × 6ft 6in

Small single, single, small double and double are all 190 cm long. King, super king and emperor are 200 cm long, so moving from a double to a king adds 15 cm of width and 10 cm of length.

Which size is most popular?

Which? says around four in ten of its members own a king-size mattress, making it the most popular size in its survey, with the double second. MattressNextDay calls the double the most popular size in the UK. Both are common; the right one depends on your room.

Sizes can differ by a couple of centimetres

BedGuide notes that sizes can differ by about 2 cm between makers, so check the label. Emperor is the least standard: BedGuide says its size varies by maker, and MyBedFrames lists larger “giant” beds too.

What goes with each size

Cot and cot-bed sizes are on KidsSizes.

Questions

What size is a double bed in the UK?

A UK double mattress is 135 × 190 cm (4ft 6in × 6ft 3in).

What size is a king-size bed in the UK?

A UK king mattress is 150 × 200 cm (5ft × 6ft 6in).

What size is a super king bed?

180 × 200 cm (6ft × 6ft 6in), the same as two 90 cm wide singles side by side.

Is a UK queen the same as a double?

No. In the UK, “queen” usually means a small double, 120 × 190 cm. A US queen is bigger.

Where these numbers come from

Checked 21 October 2026. Makers round sizes differently, so always check the dimensions on the product you're buying.