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16 July 2026 · Asreen Beds Buying Guide Team
A UK Super King mattress measures 180 x 200cm. The frame itself is larger again — typically 185–195cm wide and 210–220cm long once you account for the headboard and footboard. Measure your intended wall space against the frame dimensions, not just the mattress size.
As a working minimum, most Super King bedrooms need to be at least 4m wide to feel comfortable rather than cramped — see our full Bed Size Guide for the other UK sizes if Super King turns out too large for your room.
A Super King frame in its packaging is large. Before ordering, measure your front door width, hallway width, any stairwell turns, and the door into the bedroom itself. Most frames ship flat-packed and go together in the room, but the packaging still needs to get there in one piece.
If you're on a narrow staircase or in a flat with a tight turn on the landing, check the specific product's packaged dimensions against your access route before ordering, not after delivery arrives.
Is Super King too big for a standard UK bedroom?
It can be — as a rule of thumb, if your room is under 3.5m wide, a King size usually fits more comfortably. Super King suits rooms of 4m or more.
Do Super King sheets fit a King frame or vice versa?
No — Super King and King are different dimensions (180 x 200cm vs 150 x 200cm), so bedding isn't interchangeable between the two sizes.
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