UK Duvet Sizes in cm: Single, Double, King and Super King

Duvet sizes are one of the few parts of a bed that the UK has more or less agreed on. The names are the same as the bed sizes, but the numbers are not: every duvet is wider than its mattress so that it falls over both sides. This guide gives the measurements in centimetres and inches, the bed each duvet fits, how much it hangs over the edge, and what to check before you buy a duvet cover.

Measurements checked against the duvet inserts and duvet covers we sell on 6 November 2026.

UK duvet size chart

Duvet size	Centimetres	Inches (approx.)	Fits this bed	Overhang each side
Single	135 × 200 cm	53 × 79 in	Single, 90 × 190 cm (3 ft)	about 22 cm
Double	200 × 200 cm	79 × 79 in	Double, 135 × 190 cm (4 ft 6 in)	about 32 cm
Double	200 × 200 cm	79 × 79 in	Small double, 120 × 190 cm (4 ft)	about 40 cm
King	230 × 220 cm	91 × 87 in	King, 150 × 200 cm (5 ft)	about 40 cm
Super King	260 × 220 cm	102 × 87 in	Super King, 180 × 200 cm (6 ft)	about 40 cm

The overhang is the duvet width minus the mattress width, halved. It is the part that covers the side of the mattress and stops the duvet sliding off when two people turn over. Notice that the Single gets the least: a single bed sleeps one person, so there is less pulling.

Single duvet size

A UK single duvet is 135 × 200 cm (about 53 × 79 inches). It fits a standard 3 ft single bed, which is 90 × 190 cm, leaving roughly 22 cm over each side. A single duvet cover is the same 135 × 200 cm. If you are dressing a child's bed or a guest room, this is the size to buy; for every other single-bed measurement, see the single bed size guide.

Shopping for a 3ft bed? Every single duvet cover, fitted sheet and pillowcase we make is on the single bedding page.

Double duvet size

A UK double duvet is 200 × 200 cm (about 79 × 79 inches), a perfect square. It fits a 4 ft 6 in double bed (135 × 190 cm) with about 32 cm over each side, and it is also the right duvet for a 4 ft small double, where it hangs about 40 cm over each side. There is no separate small double duvet size. A double duvet cover measures 200 × 200 cm too. The double bed size guide covers the sheet and pillowcase sizes for the same bed.

For a 4ft 6in bed, see double bedding. If yours is a 4ft small double, the small double bedding page explains which pieces fit.

King size duvet size

A UK king size duvet is 230 × 220 cm (about 91 × 87 inches). It fits a 5 ft king bed, 150 × 200 cm, with about 40 cm over each side. It is 20 cm longer than a double duvet because a king mattress is 10 cm longer than a double. A few brands cut their king duvets at 225 × 220 cm, which still goes into a 230 × 220 cm cover without trouble. The king size bed guide has the rest of the king measurements.

All of our 5ft pieces are gathered on the king size bedding page.

Super king duvet size

A UK super king duvet is 260 × 220 cm (about 102 × 87 inches). It fits a 6 ft super king bed, 180 × 200 cm, again with about 40 cm over each side. Super king and king duvets are the same length and differ only in width, which is why a king duvet on a super king bed feels almost right and then slips off one side in the night. Every super king measurement is on our super king bedding page.

Duvet cover sizes

A duvet cover is sewn to the size of the duvet, not the bed. So the cover sizes are the duvet sizes: single duvet cover 135 × 200 cm, double duvet cover 200 × 200 cm, king size duvet cover 230 × 220 cm and super king duvet cover 260 × 220 cm. When you shop for a cover, check the size printed on your duvet's label rather than the size of your bed. If you upgraded the bed but kept an older duvet, the label is the number that matters.

Duvet cover	Size	Use it with
Single duvet cover	135 × 200 cm	A single duvet
Double duvet cover	200 × 200 cm	A double duvet, on a double or small double bed
King size duvet cover	230 × 220 cm	A king duvet
Super king duvet cover	260 × 220 cm	A super king duvet

Our duvet covers are cut to these four sizes in cotton percale, cotton sateen, cloud cotton and French linen, with a concealed button closure and ties inside the corners to hold the duvet in place. If you are unsure which closure you prefer, we compared them in button or zip duvet cover.

Sizes you might see that are not standard

Most of the confusion comes from duvets bought abroad or from brands that use their own cuts:

• 140 × 200 cm and 155 × 220 cm are common continental single sizes. A 140 cm duvet is slightly wide for a UK single cover; a 155 × 220 cm duvet will not fit one at all.
• 200 × 220 cm is a longer continental double. It will be 20 cm too long for a UK double cover.
• 240 × 220 cm is a continental size for a 160 or 180 cm bed. It is 10 cm too wide for a UK king cover and 20 cm too narrow for a super king cover.
• Emperor duvets, at around 290 × 235 cm, are made for 7 ft beds. We don't cut Emperor as standard.

If your duvet is one of these, a cover in the nearest UK size will either bunch or strain. We cut duvet covers to non-standard measurements in the same fabrics; send the size through our custom sizes form.

Should you buy a bigger duvet than your bed?

Many couples put a king duvet on a double bed. On a 135 cm mattress a 230 cm duvet hangs about 47 cm over each side instead of 32 cm, which means less tugging in the night. It works well as long as you remember two things: the duvet cover must then be a king size cover too, and the extra width sits on the floor-side edges, so on a bed pushed against a wall it can look untidy. Going up a size on a super king is not possible with standard UK sizes, because the super king is the largest.

The duvet's warmth is a separate choice from its size. Our guide to duvet tog ratings explains the 4.5, 10.5 and 13.5 tog options.

How to check the size of a duvet you already own

1. Look for the sewn-in label, usually at a corner. It gives the size in centimetres.
2. If there is no label, lay the duvet flat on the floor and measure the two edges with a tape measure, without stretching it.
3. Compare with the chart above. Anything within 5 cm of a standard size will fit that size of cover.

For the sheet and pillowcase sizes that go with each duvet, see bed sheet sizes UK, UK pillow sizes and the full UK bed size guide.

Duvet size questions

What size is a double duvet in the UK?

A UK double duvet is 200 × 200 cm. It fits a 135 × 190 cm double bed and also a 120 × 190 cm small double bed.

What size is a king size duvet cover?

A UK king size duvet cover is 230 × 220 cm, the same as a king duvet. It is for a 150 × 200 cm king bed.

What size is a super king duvet?

A UK super king duvet is 260 × 220 cm. It fits a 180 × 200 cm super king bed and is 30 cm wider than a king duvet.

What size is a single duvet?

A UK single duvet is 135 × 200 cm. It fits a 90 × 190 cm single bed.

Is 200 × 200 a double or a king duvet?

200 × 200 cm is a double duvet in the UK. A king duvet is 230 × 220 cm.

Should the duvet cover be bigger than the duvet?

No. A duvet cover should be the same size as the duvet. A cover that is too big lets the duvet bunch at one end, and one that is too small squashes the filling.