In the UK, a king size bed is bigger than a queen. A British king size measures 150cm by 200cm, and beds listed here as queen are usually the same 150cm width, sometimes quoted at 152cm. Where the two genuinely differ is in countries that use both terms in the same range, and there a king is 193cm wide against a queen at 152cm.
The answer therefore depends on which sizing system you are looking at, which is exactly why the question causes so much confusion for British shoppers comparing listings.
British bed sizes run in a settled order: single at 90cm, small double at 120cm, double at 135cm, king size at 150cm and super king at 180cm. Lengths are 190cm for single through double, and 200cm for king and super king.
Queen does not appear anywhere in that sequence. When it turns up in a UK listing, it has almost always been borrowed from an international specification and describes a 150cm wide mattress, which is the British king size. A retailer using both terms in the same catalogue is generally treating them as interchangeable.
The size that plays the role of the genuinely large bed in Britain is the super king at 180cm. If you are looking for the biggest standard option available here, that is the one to compare against, not an imported king figure.
In systems that use queen and king as separate sizes, the gap is substantial. A queen is around 152cm by 203cm and a king around 193cm by 203cm, a difference of 41cm in width. That is why articles written for other markets treat the choice between them as significant.
Applying those figures to a UK purchase leads to problems. A 193cm wide mattress will not fit a British king size frame built for 150cm, and bedding sized for one system fits the other poorly. The only reliable approach is to compare centimetre measurements rather than names.
If you are buying an imported frame, confirm the mattress size it accepts before assuming UK mattresses will fit. A 3cm mismatch in length is enough to leave a gap at the foot that traps bedding.
For most British buyers, the real decision is between a double at 135cm, a king at 150cm and a super king at 180cm. Divided between two people, that is 67.5cm, 75cm or 90cm each. A standard single is 90cm wide, which makes the super king a useful reference point: each sleeper has the equivalent of their own single bed.
A king suits most couples in most main bedrooms. A super king is a noticeable improvement for light sleepers or anyone who shares with children or pets, but it demands a room wide enough to keep both walkways usable. Comparing the modern super king size fabric beds UK sale range against king width options makes the footprint difference clear.
Do not overlook length. King and super king are both 200cm, so stepping up from a double gains 10cm of length as well as width. For taller sleepers that can matter more than the extra width does.
Work from the external frame dimension, not the mattress. A 150cm mattress typically sits in a frame between 155cm and 168cm wide. A 180cm mattress sits in a frame between 185cm and 198cm.
Add 60cm to 70cm of walkway on each side you need to pass down. A king therefore needs a room around 2.9m to 3.1m wide, and a super king needs closer to 3.2m to 3.4m. Below those figures the bed still physically fits, but bed making and wardrobe access become awkward.
Mark the footprint on the floor with masking tape before buying. Walk the route to the window and the wardrobe. If you turn sideways to pass, the bed is too large for the room regardless of what the measurements suggest on paper.
A slim framed larger bed can occupy less floor than a heavily padded smaller one. Deeply upholstered side panels and winged headboards add significantly to the external footprint, while platform frames add only the thickness of the rails.
If the room is marginal, that distinction lets you have the bigger mattress without the bigger footprint. Comparing the same design across sizes in the modern king size leather beds UK range shows how much variation exists at a single mattress width.
Storage frames also change the calculation. A larger ottoman base holds enough to replace a separate chest or blanket box, which can free floor space elsewhere and offset the extra width the bed takes.
UK king size bedding fits 150cm by 200cm mattresses. Super king bedding fits 180cm by 200cm. A bed listed as queen in Britain will normally take king size bedding, though checking the mattress width first avoids a tight fitted sheet.
Larger bedding is less widely discounted and heavier to wash and dry, which is a genuine consideration in homes without much drying space. A king duvet at 225cm by 220cm is manageable in a domestic machine. A super king duvet at 260cm by 220cm often is not.
Weight matters for handling too. A super king mattress is difficult to turn alone and harder to carry up a narrow staircase. Check your access before committing.
Ignore the naming and work from three numbers: the width of the mattress, the external width of the frame and the width of your room. Those tell you what will actually work.
If the room is 3m wide or less, a king at 150cm is the sensible upper limit. Between 3.2m and 3.5m, a super king becomes comfortable. Above that, either works and the decision comes down to how much floor you want to leave for other furniture. Pair the choice with slim bedside units from the modern bedside cabinets UK sale range if clearance is tight. At Furniture in Fashion we publish external frame measurements alongside mattress sizes so the comparison can be made accurately.
The reliable method takes ten minutes and needs only masking tape. Mark the external frame footprint on the floor, not the mattress size, then walk the room as you normally would: to the wardrobe, to the window, to the door.
Pay attention to the walkways either side. Anything below 50cm will feel restrictive in daily use, and 60cm to 75cm is where a room stops feeling tight. Then open every wardrobe door and pull out every drawer fully while the tape is still down.
If the room passes that test with the larger footprint, the larger bed is the better choice. If it does not, the smaller size will produce a more comfortable room even though the mattress is narrower.
Moving up a size carries costs that appear after purchase. Bedding is the obvious one: duvets, fitted sheets and mattress protectors all step up in price, and the largest sizes have less choice on sale.
Mattresses scale in price too, and more sharply than frames, because the materials increase in proportion to area rather than width alone. Replacing a large mattress in several years is a bigger commitment than replacing a smaller one.
There is a practical cost as well. Larger mattresses are heavy and difficult to handle alone, so choosing a model that needs no turning is worth doing at the point of purchase rather than discovering the problem later.
Start from how you sleep rather than from what the room could theoretically hold. Two still sleepers are well served by 150cm. Two people who change position frequently, or who share the bed with a pet, will use every centimetre of 180cm.
Then apply the room test. Where the room genuinely allows the larger size with proper walkways and full storage access, take it. Where it does not, the smaller bed with well proportioned furniture around it produces the better bedroom.
Whichever size you land on, buy bedding in the same size at the same time and check the external frame dimensions rather than the mattress figures. Those two habits prevent almost every disappointment that follows a bed purchase.
A UK king size is 150cm by 200cm, and beds listed as queen here are usually the same width. In markets that use both names as separate sizes, a king is considerably wider at around 193cm.
The super king at 180cm by 200cm. It gives each of two sleepers 90cm of width, the same as a standard single bed.
Usually, because both are around 150cm wide in Britain. If the mattress is 152cm rather than 150cm, a 150cm fitted sheet may be tight at the corners.
Thirty centimetres. A king is 150cm and a super king is 180cm, giving each sleeper an extra 15cm of personal width.
Yes, both are 200cm long in the UK. Only the width differs between them.
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