Compared like for like, a king is bigger than a queen. In the American range where both names originate, a king measures about 193cm by 203cm and a queen 152cm by 203cm, a difference of roughly 41cm in width.
The complication is that Britain has its own king. A UK king is 150cm by 200cm, which is a fraction smaller than a queen rather than larger. So if you are standing in front of a British bed labelled king and comparing it mentally with a queen you slept in abroad, expect them to feel the same rather than one being noticeably wider.
Names are unreliable, so read the specification. Any trustworthy listing gives the mattress size in centimetres, and often the external frame footprint as well. If a product page shows only a name, treat it with caution.
There are a few quick tells. A width of 150cm means a British king. A width of 152cm points to an international queen. A width of 180cm is a British super king, and anything near 193cm is an American king. Length is a second clue: British large beds are 200cm, while American ones are 203cm.
When a listing states both a name and a measurement that disagree, believe the measurement. Every frame in our modern high gloss beds UK sale range carries its dimensions on the product page for this reason, since the specification is what your mattress and bedding have to match.
Width per sleeper is a more useful figure than total width. An American king gives each person around 96cm. A British super king gives 90cm. A queen gives about 76cm and a British king about 75cm. A British double gives roughly 67cm.
For context, a British single bed is 90cm wide. So a super king effectively gives each sleeper a single bed’s worth of space, while a queen or British king gives a little less than that. Anyone who currently shares a double and finds themselves woken by movement will notice the improvement immediately at either size.
Length behaves differently. Three centimetres between 200cm and 203cm makes almost no practical difference. The meaningful jump is from 190cm, which is the length of British singles, small doubles and doubles, up to 200cm. If you or your partner is over about 180cm tall, that 10cm is the change worth paying for.
Getting this wrong has consequences that show up weeks later. A mattress bought a couple of centimetres undersized will shift within its frame, and the gap at the sides collects bedding and dust while leaving the mattress edge unsupported.
Fitted sheets are the other frequent casualty. A sheet cut for 150cm by 200cm placed on a 152cm by 203cm mattress will be tight at the corners, and if the mattress is deep it will not hold at all. Buying a set only to discover it lifts every night is a small expense repeated until you replace it correctly.
Divan bases are the most awkward mismatch, because base and mattress must agree exactly for the edges to be carried properly. If you already own a base, measure it and buy to that figure rather than to whatever the base was called when you bought it.
Add the frame to the mattress before judging fit. Padded rails commonly add 8cm to 15cm across the width, and a headboard adds 6cm to 15cm of depth. Then leave 60cm minimum of walking space, or 70cm to 75cm where a drawer or wardrobe door has to open.
On that basis a British king suits a room of about 3.2m by 3.6m. A super king wants nearer 3.6m by 3.8m. A room of 3m by 3m is really double territory once storage is included, and a box room under 2.6m wide is better served by a small double or single.
Ceiling slopes, chimney breasts and radiators often decide the layout before dimensions do. A bed placed under a slope needs headroom where you sit up, not just where you lie down. A bed in front of a radiator wastes heat and can dry upholstery, so an internal wall is usually the better position.
The larger the bed, the more carefully the rest of the room has to be planned. Once a 150cm or 180cm footprint is in place, floor level storage becomes scarce, so look upward and underneath.
Tall wardrobes hold far more than low ones for the same floor area, and sliding doors remove the swing that eats into walking space. Our modern wardrobes UK sale range includes heights that suit standard British ceilings, which is worth checking against the room before ordering.
Under bed storage is the other lever. Drawer frames are simple and cheap to use daily. Lift up platforms give the whole area beneath the mattress, which on a wide bed is a considerable volume, though you need clearance in front to raise it.
In darker rooms, reflective finishes help offset the visual weight of a large bed. Pieces from our mirrored bedroom furniture UK sale selection bounce daylight around and keep a room from feeling closed in, which matters more once the bed occupies most of the floor.
Bigger is not automatically better. If the largest bed the room can hold blocks a wardrobe, forces you to sidle past a chest of drawers, or means one person climbs over the other to get out, the room has lost more than the bed has gained.
There is also the question of moving it. Wide mattresses are difficult to turn on a landing, and rigid bases in the largest sizes frequently cannot be brought upstairs in Victorian and Edwardian houses. Check packed dimensions, and prefer sectional frames or split bases where access is tight. Listings such as our super king size metal beds UK range state how the frame is packed, which tells you whether it will reach the room.
Weigh the bed against the whole room rather than against the ideal of a large bed. Measurements for every frame and base are published across the range at Furniture in Fashion, so the comparison can be made properly before anything is ordered.
Put the two listings side by side and ignore the names entirely. Write down the mattress width in centimetres for each, then the frame width, then the length. If one listing gives inches and the other centimetres, convert both to centimetres so nothing is lost in the comparison. At that point the answer is obvious, and no amount of naming can confuse it.
Next, check the length against the tallest person who will use the bed. Allow at least 10cm beyond standing height so feet are not pressed against a footboard. Most British sizes give 190cm to 200cm of usable length, which suits the majority of adults, though anyone over about six foot three should look for a longer frame or a design without a raised end.
Then compare the height of the sleeping surface. A low platform bed looks calm and works well in a room with a low ceiling, but it asks more of your knees. A higher divan style is easier to get in and out of and leaves usable space underneath. Neither is better, and it is worth deciding deliberately rather than discovering it after delivery.
Last, think about the bedding you already own. Moving up a size means replacing duvets, sheets and mattress protectors, which is worth budgeting for at the same time so the bed can be used properly from the first night rather than being made up with linen that does not quite reach the corners.
A British king is 150cm by 200cm and a queen is 152cm by 203cm, so the queen is very slightly larger. The two are best regarded as the same size in practice.
About 41cm wider, at roughly 193cm against 152cm, with both measuring 203cm long. That is a substantial difference and needs a much larger room.
The king at 150cm by 200cm. If you want more space than a queen, the British super king at 180cm by 200cm is the next step up.
No. A 152cm mattress in a 150cm frame will bow along the sides, which distorts the comfort layers. Match the mattress to the frame’s stated internal size.
Only if you can keep 60cm or more of walking space and every door can still open. Otherwise the daily inconvenience outweighs the extra sleeping width.
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