UK duvet sizes are: Single 135 × 200cm, Double 200 × 200cm, King 225 × 220cm and Super King 260 × 220cm. Match the duvet to your bed size — or go one size up if you share a bed or want a fuller, hotel-style drape over the sides.
| Bed | Duvet (cm) | Duvet (inches) |
|---|---|---|
| Single (90 × 190cm bed) | 135 × 200 | 53" × 79" |
| Small Double (120 × 190cm bed) | 200 × 200 | 79" × 79" |
| Double (135 × 190cm bed) | 200 × 200 | 79" × 79" |
| King (150 × 200cm bed) | 225 × 220 | 89" × 87" |
| Super King (180 × 200cm bed) | 260 × 220 | 102" × 87" |
Size up one bed size if you share a bed (it stops duvet-hogging), have a deep mattress, or want the draped hotel look — a King duvet on a Double bed is a popular stylist's trick. Keep the matching size for children's rooms and where the bed sits against a wall.
| Season / bedroom | Tog | Best for |
|---|---|---|
| Summer / hot sleepers | 4.5 | Warm bedrooms, summer months |
| Spring & autumn | 10.5 | Most UK bedrooms most of the year |
| Winter | 13.5 | Unheated bedrooms, cold sleepers |
| Deep winter | 15 | Very cold rooms, no overnight heating |
Note: under-1s should not use a duvet at all; young children need much lower togs — never above 4 tog for toddlers.
The duvet — always. A common mistake is buying the cover to match the mattress size.
No — a UK King (225 × 220cm) is closer to a US Queen; check centimetres, not names.
13.5 tog suits most UK homes; choose 15 tog if your bedroom is unheated overnight.
Yes — both take 200 × 200cm.
Memory foam retains heat, so drop one tog level from what you'd normally choose.
Roughly every 5 years for synthetic fills — sooner if it has lost loft or warmth.
Next: Mattress Topper Size Guide
Written by the Posh Tag team, Rochdale, Lancashire. Published: 12 July 2026 · Last reviewed: 12 July 2026.
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