A UK super king size bed measures 180cm wide by 200cm long, or 6ft by 6ft 6in in imperial. It is the largest standard bed size sold in the UK, and it is exactly the width of two single beds placed side by side.
The frame will add to those figures. Most super king frames come in between 188cm and 205cm wide overall, with upholstered designs at the upper end of that range. Length usually lands between 205cm and 215cm once a headboard and footboard are accounted for.
Compared with a king at 150cm wide, a super king gives you an extra 30cm across. Split between two sleepers, that is 15cm each, taking personal width from 75cm to 90cm per person. To put that in context, 90cm is the full width of a standard UK single bed, so each person effectively gets a single bed’s worth of space.
Compared with a double at 135cm, the difference is 45cm, which transforms how the bed feels. The length stays the same as a king at 200cm, so if extra length is what you need, moving from king to super king will not help. In that case look at extra long frames rather than wider ones.
This is the deciding factor for most people. A super king is a substantial piece of furniture, and dropping one into a room that cannot carry it makes the whole space feel cramped rather than luxurious.
For access on both sides plus a walkway at the foot, allow a room of at least 340cm by 350cm. That gives roughly 70cm of clearance around the three open sides, which is enough to walk comfortably, open a wardrobe door and make the bed without contortion.
You can compress that to around 300cm of width if you accept narrower walkways of 60cm, but below that the bed dominates. If your room is 280cm or less, a king will almost always give you a better room overall, even though the bed itself is smaller.
Also think about proportion rather than just fit. A super king in a room with a low ceiling can look heavy, and a tall solid headboard makes that worse. Lower profile frames and open headboard designs sit more comfortably under a lower ceiling.
Upholstered frames are the most popular choice at this size, partly because the scale suits a generous headboard and partly because soft materials take the visual edge off such a large piece. Deep buttoned and panelled headboards work particularly well, and our modern super king size fabric beds UK sale range shows how much difference headboard height makes to the presence of the bed.
Wooden super kings bring warmth and a more grounded look, and they suit rooms with wooden flooring or other timber furniture. The main consideration is weight: solid timber at this size is heavy, so plan assembly with two people and think about whether you will ever want to move it.
Leather and leather effect frames give a cleaner, more architectural line and wipe down easily, which is a genuine advantage in a bedroom that doubles as a space for morning coffee. Our modern super king size leather beds UK selection covers both padded and slimline profiles.
A 180cm span needs proper engineering underneath. Look for a base with a full central support rail running head to foot with its own legs, and ideally two support rails on wider designs. Without that, the middle of the mattress will settle over time no matter how good the mattress is.
Slat count and type matter more at super king than at any smaller size. Sprung beech slats spaced no more than 7cm apart will support the mattress evenly. Widely spaced flat slats allow the mattress to sag between them, which shows up as ridging within a couple of years.
Mattress handling is a real consideration. A pocket sprung super king mattress is genuinely heavy and awkward for one person. Some manufacturers offer them as two linked halves, which solves both the delivery problem and the turning problem, and also allows different firmness on each side. If you share with someone whose preference differs from yours, that split construction is worth seeking out.
Super king duvets measure around 260cm by 220cm. Buying a king duvet for a super king bed is a common mistake and leaves the sides short, so check the stated size rather than assuming the largest one on the shelf is right.
Fitted sheets need to match both the 180cm by 200cm footprint and the mattress depth. With deeper mattresses common at this size, deep fitted sheets are usually the safer purchase. Flat sheets and valances follow the same sizing.
Pillows change the look at super king. Two standard UK pillows leave visible gaps at each end of a 180cm headboard, so most people use three standard pillows, or two standard plus two square continental pillows layered behind. It is a small detail that makes the bed look finished rather than sparse.
With a super king in place, the remaining furniture has to be chosen carefully. Bedside cabinets need to be tall enough to reach a comfortable height beside a substantial mattress, and slim enough not to close down the walkway. Around 45cm wide and 55cm to 60cm tall works well.
An ottoman or bench at the foot of the bed suits the scale and gives somewhere to sit or place folded bedding. Our modern ottomans UK sale range includes sizes that line up neatly with a 180cm bed width.
Storage under the bed is exceptionally useful at this size, because the footprint is so large. An ottoman super king base holds a considerable amount, though the lid is heavy and needs decent gas struts and enough clearance above to open fully. Check ceiling height and light fittings before choosing one.
For the wider room, our modern bedroom collections UK pair larger frames with wardrobes and drawers in matching finishes, which helps a big bed look intentional rather than imposing.
It suits couples who value undisturbed sleep above all, households where children or pets join the bed, and larger bedrooms that look underfurnished with a smaller bed. In a well proportioned room it makes the space feel considered and calm.
It is the wrong choice in rooms under 300cm wide, where the bed will overwhelm the floor plan, and in bedrooms with awkward access where getting the mattress upstairs may prove impossible. It also costs more to dress, since bedding at this size is priced above king.
At Furniture in Fashion we would rather help a customer pick the size that suits their room than the largest size available, and our full modern beds UK sale range includes every UK size with dimensions listed. Free delivery is available to most UK mainland postcodes.
6ft wide by 6ft 6in long, equivalent to 180cm by 200cm.
Yes. Both are 200cm long in UK sizing. Only the width differs, at 150cm for a king and 180cm for a super king.
The frame arrives flat packed and will. A one piece sprung mattress at 180cm wide is the challenge, so measure your tightest turn or look for a split mattress option.
No. A king duvet at 225cm by 220cm will leave the sides of a 180cm mattress uncovered. Buy super king bedding sized at around 260cm by 220cm.
Around 340cm by 350cm for comfortable clearance on both sides and at the foot. Below 300cm of width, a king is usually the better decision.
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