Your bed size
200 × 200 cm
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Pick your bed to get the right duvet size in cm and inches, or compare UK, EU and US sizes.
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Every UK duvet size in centimetres and inches, the bed it fits, and the closest US comforter. Buy the duvet cover to match the duvet, not the bed.
| Duvet | Fits bed | Size (cm) | Size (inches) | US comforter |
|---|---|---|---|---|
| Single | Single | 135 × 200 | 53 × 79 | ≈ Twin |
| Double | Small double & double | 200 × 200 | 79 × 79 | ≈ Full / Queen |
| King | King | 225 × 220 | 89 × 87 | ≈ Queen / King |
| Super King | Super king | 260 × 220 | 102 × 87 | ≈ King |
| Emperor | Emperor | 290 × 235 | 114 × 93 | ≈ Cal King + |
Quick answers before you buy.
A double bed takes a 200 × 200 cm double duvet (about 79 × 79 in). If two of you compete for the cover, size up to a king duvet (225 × 220 cm) for more each side.
Many people size up by one (a king duvet on a double bed, say) for extra drape and to stop cold gaps. Just make sure your duvet cover matches the duvet size, not the bed size.
The UK measures the duvet itself (king = 225 × 220 cm). The US sells comforters sized to the bed (twin, full, queen, king) and they run differently, a UK king duvet is closest to a US queen/king comforter. Always check the cm/inch dimensions, not just the name.
A UK king duvet is 225 × 220 cm (about 89 × 87 in). A super king is 260 × 220 cm (about 102 × 87 in).
This catches almost everyone out. A "double" duvet is not the width of a double bed. Duvets are made deliberately larger so they drape over the sides and tuck around you, a double duvet is 200 cm wide, but a double bed is only 135 cm.
That's why you always buy the duvet cover to match the duvet, never the bed. It also means sizing up is a genuine option. Plenty of couples put a king duvet (225 cm) on a double bed so neither person gets left in the cold halfway through the night.
More couples are ditching the shared duvet for two smaller ones on the same bed, the so-called Scandinavian sleep method. Each person uses a single duvet (135 cm) on a double or king bed, so nobody steals the cover and you can each pick your own tog.
It makes the bed a little less "hotel neat", but for light sleepers and couples who run at different temperatures it's a genuine fix. You'll want a king or super king so the two singles sit side by side without a cold gap down the middle.
Skip the duvet entirely for babies under 12 months, use a tog-rated sleeping bag instead. From around one year, a cot-bed duvet is roughly 120 × 150 cm in a low 4-4.5 tog.
A junior or toddler bed takes the same cot-bed size, or a single (135 × 200 cm) if you'd rather. Keep the tog low either way, little ones overheat easily, and a 4.5 tog over a warm sleepsuit suits most rooms.
Buying from abroad, or puzzled by a "queen" duvet? Names don't travel well, always check the centimetres. Here's how the main markets line up.
| UK | Size (cm) | Europe (approx) | US / comforter |
|---|---|---|---|
| Single | 135 × 200 | EU Single 140 × 200 | Twin |
| Double | 200 × 200 | EU Double 200 × 200 | Full / Queen |
| King | 225 × 220 | EU King 240 × 220 | Queen / King |
| Super King | 260 × 220 | EU Grand King 260 × 240 | King |
Watch out, a UK "king" duvet is closest to a US queen, and "queen" in the UK usually means a small-double bed, not a duvet size. Go by the dimensions every time.
The standard advice is to buy the duvet that matches your bed, a double duvet for a double bed. But sizing up by one is a genuinely popular move, and worth it if any of these apply:
You share the bed. Two people on a double often end up in a nightly tug-of-war; a king duvet on a double gives everyone enough to tuck in. You feel the cold. More overhang means fewer draughty gaps down the sides. You have a deep mattress or a topper. Tall mattresses eat into the drop, so a bigger duvet keeps the coverage.
The one rule if you size up: buy the duvet cover to match the duvet, not the bed. A king duvet needs a king cover, even on a double bed.
Not really. In the UK, "queen" usually describes a small-double bed (120 cm wide), and there's no standard UK "queen" duvet, you'd use a double. "Queen" as a duvet size is a US and Australian term, so always check the cm rather than the name.
Match the cover to the duvet, not the bed. A king duvet needs a king cover even if it's on a double bed. Covers are made a touch larger than the duvet so it fits inside without bunching.
Not directly, warmth is the tog rating, which is separate from size. But a duvet that's too small leaves cold gaps at the sides, so getting the size right does keep you warmer in practice. Check the tog you need alongside the size.