UK bed sizes

All UK sizes in centimetres, feet and inches

Metric and imperial sizes: Which? UK mattress size guide and, for the six standard sizes, the National Bed Federation buyer's guide, both checked 2026-09-24. The last column is our exact conversion (1 in = 2.54 cm) and its difference from the metric label. 11 retailer and trade pages (read on 30 September 2026) print both units for the Double, and every one prints a different width in each; they are compared on Mattress size disagreements.

Double vs Small Double: at the same 190 cm length, the Small Double is 15 cm narrower, so two people sharing get 60 cm each instead of 67.5 cm. Each size has its own page with room sizes, bedding and frames: UK Double bed size and UK Small Double bed size.

Which UK bed size suits whom

Which? describes each size by who it suits. Its words are quoted below, with the width each of two sleepers gets on that size (half the mattress, our arithmetic).

• Small Single, 75 × 190 cm: "often used for children" and "a good option for a box room or study".
• Single, 90 × 190 cm: "Unless you're a lot taller or broader than average, this is the right size for a single adult."
• Euro Single, 90 × 200 cm: for anyone whose "feet tend to dangle over the edge of the bed".
• Small Double, 120 × 190 cm: "Two adults will find a small double mattress pretty snug" (60 cm each); it suits "a small bedroom or if you sleep alone but like room to stretch out". Which? adds that a UK queen-size mattress "is effectively a small double" and that some call it a three-quarter mattress.
• Double, 135 × 190 cm: "generally long and wide enough to accommodate two average-sized adults" (67.5 cm each), and the second most popular size.
• King, 150 × 200 cm: the most popular size; four in ten Which? members own one (75 cm each).
• Super King, 180 × 200 cm: "the size of two standard single mattresses side by side" (90 cm each), though two UK Singles are 10 cm too short to fill it.
• Emperor, 200 × 200 cm: "easily big enough for two larger-than-average adults" (100 cm each).

Quotes from the Which? UK mattress size guide, read 2 November 2026.

UK sizes to scale

How much floor each UK size needs, and how tall a sleeper it fits

For new homes built to the optional M4(2) standard in England, Approved Document M asks for a clear access zone at least 750 mm wide beside a bed: on both sides and the foot of the principal double bed, on one side and the foot of every other double bed, and on one side of each single or twin bed. To show what that means for each size, we add 750 mm to the mattress width for each open side and 750 mm to its length at the foot, once with one open side and once with both. These are mattress-only sizes; a frame adds more (see bed frame dimensions). The last column applies the National Bed Federation rule that a bed should be 10 to 15 cm longer than the tallest person in it.

Walkway zones: Approved Document M, Volume 1, paragraph 2.25, read 2026-09-25. Sleeper height: National Bed Federation size advice. The government's nationally described space standard sets the smallest new-home bedrooms at 7.5 m² for a single (at least 2.15 m wide) and 11.5 m² for a double (the main double at least 2.75 m wide, any other 2.55 m). Your wardrobe and drawers still need to fit the shape of the room.

Common questions

Is a Queen bigger than a King in the UK?

No. Which? uses "queen-size" for the Small Double, 120 × 190 cm, which is 30 cm narrower and 10 cm shorter than a UK King at 150 × 200 cm. A US Queen (152.4 × 203.2 cm) is a different, larger bed; see UK vs US bed sizes.

Is a US Queen bigger than a UK King?

Slightly. A US Queen is 152.4 × 203.2 cm (60 × 80 in), 2.4 cm wider and 3.2 cm longer than a UK King at 150 × 200 cm, so a UK King fitted sheet is cut for a slightly smaller mattress. See UK vs US bed sizes.

Is a Queen larger than a Double?

In the UK, no: a UK queen-size is the Small Double, 15 cm narrower than a Double. A US Queen is larger than both a UK Double and a US Full (Double).

Is there a bigger bed than a Super King?

Yes. Which? lists the Emperor at 200 × 200 cm (6ft 6in × 6ft 6in), 20 cm wider than a Super King at the same length.

What are the Euro sizes sold in the UK?

Which? lists three: Euro Single 90 × 200 cm, Euro Double 140 × 200 cm and Euro King 160 × 200 cm. The Euro Single is 10 cm longer than a Single, the Euro Double 5 cm wider and 10 cm longer than a Double, and the Euro King 10 cm wider than a King. France uses the same three sizes (see French bed sizes).

How much bigger is the frame than the mattress?

It depends on the frame. IKEA's UK MALM frame for a 135 × 190 cm Double takes up 150 × 199 cm of floor space. See bed frame dimensions for more published frame footprints.