Super King Duvets UK | All Tog Ratings

Built for the largest standard UK bed size, with enough overhang to actually stay put through the night. Pick your tog rating below to match your bedroom and how warm you sleep.

Super king duvet dimensions

A UK super king duvet typically measures 260 x 220 cm. That's noticeably larger than the mattress itself, which is intentional — the extra width and length give enough drop on both sides and at the foot of the bed so the duvet doesn't ride up or leave gaps overnight, particularly if you tend to move around while sleeping.

Picking a tog rating for the largest UK bed size

Because a super king duvet covers more surface area than any other standard size, warmth can feel slightly more even and retained across the bed compared with smaller sizes. That's worth factoring in when choosing tog:

  • 4.5 tog — light enough for summer, or for anyone who runs warm at night
  • 10.5 tog — a comfortable middle ground for most of the year in a heated home
  • 13.5 tog — a solid winter option for colder bedrooms
  • 15 tog — the heaviest available, for the coldest rooms or those who feel the chill most

Sharing a super king bed with different temperature preferences

Super king beds are often chosen by couples specifically because they give more personal space — which sometimes extends to different warmth needs too. Rather than compromising on one shared tog rating, some households use two single duvets side by side on a super king bed instead of one large one, so each side of the bed can run a different tog. It's a practical option if one person consistently runs warmer or colder than the other overnight.

Matching your duvet cover size

A super king duvet needs a super king duvet cover to fit properly — using a king size cover on a super king duvet will leave the corners loose and the fit baggy rather than snug. If you're ordering a cover separately, double-check it's listed as super king specifically rather than assuming "king" covers both.

FAQ

What are the exact dimensions of a super king duvet?
A UK super king duvet measures approximately 260 x 220 cm, sized larger than the mattress itself to allow for proper overhang at the sides and foot of the bed.
Can two people with different temperature needs share a super king duvet?
It can work, but some couples find using two single duvets side by side gives more flexibility, since each side of the bed can then have a different tog rating rather than compromising on one shared rating.
What tog is recommended for a super king bed in colder months?
13.5 tog is a common choice for winter, with 15 tog suited to particularly cold bedrooms. Given the larger surface area of a super king, warmth can feel slightly more consistent across the bed than with smaller sizes.
Is a super king duvet the same as a king duvet with extra length?
No, super king duvets are wider as well as differently proportioned, not simply a longer version of a king duvet. Always check the exact size listed rather than assuming one scales directly from the other.
Will a king size duvet cover fit a super king duvet?
No, the two aren't interchangeable. A king cover will fit too tightly and loosely at the corners on a super king duvet, so matching the cover size to the duvet size exactly gives the best fit.