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A king bed is bigger than a queen. That holds in every sizing system where both names are used. The order of standard sizes puts queen below king, never above it.
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In American sizing, where both names are genuinely used side by side:
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The lengths are the same. The king is about 41cm wider, which is a substantial difference: roughly 20cm more width per sleeper.
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Queen is not a UK standard bed size. British sizing runs single, small double, double, king and super king. If you see a UK listing described as queen, it is almost always a marketing translation for international shoppers, and the mattress underneath will be a UK king at 150cm by 200cm.
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Here are the UK sizes in full:
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The important overlap is this: a UK king at 150cm wide is only two centimetres narrower than an American queen at 152cm. So if you have been reading American advice and decided a queen is the size you want, a UK king is what you should be buying.
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Set side by side, the pattern becomes clear:
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Notice that our super king has no exact American match. It sits between their queen and king, closer to their king in character than their queen. This is why American advice about upgrading from queen to king does not map onto a UK purchase decision.
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Dividing the width by two is the most useful way to compare beds for a couple:
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A UK king and an American queen give practically the same personal width. The step up to a UK super king adds 15cm each, which is the point at which two sleepers stop being aware of one another during the night.
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Width dominates the conversation but length decides comfort for taller sleepers. UK single, small double and double all measure 190cm. King and super king both measure 200cm. American queen and king both run to around 203cm.
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Allowing roughly 10cm to 15cm beyond your height, a 200cm mattress suits sleepers up to around 185cm. Above that, the three extra centimetres on an American size are not enough to be worth importing a mattress for, and a UK king remains the sensible choice.
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A UK king works comfortably in a bedroom of around 3m by 3.6m, which is roughly 10ft by 12ft. That allows walking space on both sides plus room for bedside cabinets and a wardrobe.
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Clearances to plan for:
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In narrower rooms a king still fits with one side against a wall, which is a normal arrangement in Victorian terraces and loft conversions. It simply means one person climbs over rather than walks round.
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Whichever size you choose, remember the frame is bigger than the mattress. A UK king frame typically measures 155cm to 168cm wide overall, depending on whether the design is a slim metal frame or a deeply upholstered bed. Length can reach 208cm to 214cm with a tall headboard.
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When a bed goes between fixed walls, measure the space at skirting level, mattress height and headboard height, use the smallest figure, then allow a couple of centimetres of tolerance. Our modern king size high gloss beds UK sale listings state the overall frame footprint, which is the number that determines whether the bed fits.
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This is the most common and most expensive mistake in the king versus queen question. Bedding is cut to specific mattress dimensions, and the names are not interchangeable.
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A UK king duvet cover is typically 225cm by 220cm. An American queen duvet is around 230cm by 220cm. An American king duvet is much wider at roughly 260cm by 220cm, similar to a UK super king cover.
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Duvet covers are forgiving because overhang is expected. Fitted sheets are not, since they are cut to exact mattress dimensions with a fixed depth. An American queen fitted sheet on a UK king mattress will not hold the corners properly. Buy UK bedding for a UK mattress, and read the centimetre figure rather than the name.
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Once a king takes the centre of the room, the remaining wall space has to work efficiently. Height beats width for storage: a tall narrow wardrobe holds as much as a wide low one while leaving more floor visible.
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Sliding doors are worth serious consideration when a bed sits close to the wardrobe, since they need no clearance in front. For bedside storage, closed drawers keep a busy room looking calmer than open shelving, and our modern high gloss bedside cabinets UK range includes narrow depths for tight gaps beside a large bed.
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If you are replanning the whole room rather than replacing the bed alone, our modern bedroom furniture UK sale pages group beds with matching wardrobes, cabinets and drawers.
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Numbers on a screen are less persuasive than tape on a floor. Mark out 150cm by 200cm, then add the frame allowance from the product page. If you are weighing up a super king, mark 180cm by 200cm alongside it.
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Leave the tape down overnight. Open the wardrobe, walk past with an armful of laundry, and check whether the door still swings freely. Most people find the decision makes itself within a day.
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Our full size range, from single through to super king, is set out across modern beds UK sale if you want to compare footprints before you start taping.
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We stock every UK standard bed size in fabric, leather, wood, metal and high gloss finishes, with mattress and frame measurements listed on each product page. You can shop modern furniture for every room at Furniture in Fashion, with free delivery to most UK mainland postcodes.
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Beyond width and length, bedding is cut to a depth. UK king fitted sheets typically allow for mattresses up to around 25cm to 30cm. Deep fill versions extend to roughly 40cm and are worth buying if you have chosen a thick hybrid or pocket sprung mattress.
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A sheet that is marginally shallow will lift off the corners every night. On a wide mattress the corners are further apart, so the problem is more noticeable than on a double.
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A 150cm mattress spans a considerable distance without support. Sprung slats spaced no more than around 7cm apart give even backing, and the frame should include a central rail with at least one leg reaching the floor.
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Frames sold at king size without central support tend to allow the mattress to dip through the middle within a couple of years, regardless of mattress quality. It is one of the more useful specification details to check before ordering.
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Where a bed frame was built for an American queen or king mattress, measure the internal frame dimensions and buy the mattress to fit the frame rather than the name on the label.
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A UK king mattress inside a queen frame leaves a small gap at each side, which is manageable once bedding is on. The reverse does not work, because forcing a wider mattress into a narrower frame bows the rails and permanently compresses the mattress edges. Where the gap is more than a few centimetres, a made to measure mattress is the cleaner solution.
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King. In American sizing a king is around 193cm wide against 152cm for a queen, with both at the same 203cm length.
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No. UK sizing runs single, small double, double, king and super king. A bed labelled queen in the UK is usually a 150cm king.
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A UK king at 150cm by 200cm, which is within two centimetres of an American queen in width.
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No. An American king is around 193cm wide, considerably wider than our 150cm king and wider than our 180cm super king.
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Duvet covers often work, but fitted sheets are cut to exact mattress dimensions and will not sit correctly. Use UK king bedding.
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Most UK beds are either 190cm or 200cm long. Singles, small doubles and doubles measure…
A king bed in the UK has mattress dimensions of 150cm by 200cm, which is…
A standard size single bed in the UK has a mattress of 90cm by 190cm,…
A queen size bed is approximately 150cm by 200cm, which is 5ft by 6ft 7in…
Double beds are 190cm long in the UK, which is 6ft 3in, and that length…
An American queen size bed measures 152cm by 203cm, or 60in by 80in, while Australia…
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