What Bed Is Bigger Queen or King?

The Answer Depends on Which Country You Are In

In the UK, a king size bed is bigger than a queen. A British king measures 150cm by 200cm, while queen is not a British standard at all and is generally taken to mean around 152cm by 203cm using the American definition. In the United States the answer flips: an American king measures 193cm by 203cm, which is considerably wider than an American queen at 152cm by 203cm.

So the confusion is not about which bed is larger. It is about which country’s naming system you are using. A British king and an American queen are within a few centimetres of each other. An American king is closer to a British super king at 180cm by 200cm. Once you know that, comparisons become straightforward.

Why the Two Systems Diverge

British bed sizes evolved around imperial widths in feet and inches: 3ft single, 4ft small double, 4ft 6in double, 5ft king, 6ft super king. American sizes grew from a different retail tradition and settled on twin, full, queen, king and California king with no direct relationship to the British ladder.

The result is that the same word describes different beds depending on where the label was printed. It creates real problems when British shoppers buy bedding from international sellers, or when frames sourced abroad arrive expecting a mattress that is not sold here in that size.

The safest approach is to ignore names and work in centimetres. Every reputable British listing gives the mattress size in centimetres, and matching those numbers removes the ambiguity entirely.

British Sizes Compared Side by Side

A British double measures 135cm by 200cm at the newer standard, though 190cm remains common, and gives each of two sleepers 67.5cm of width. A British king at 150cm by 200cm gives each sleeper 75cm and adds ten centimetres of length over a 190cm double. A British super king at 180cm by 200cm gives each sleeper 90cm, which is the same width as a full single mattress each.

Those numbers explain the felt difference. Moving from a double to a king adds 7.5cm per person, which is noticeable but not transformative. Moving from a double to a super king adds 22.5cm per person, which changes how the bed feels entirely.

Length is the other half of the equation. Both king and super king run to 200cm, suiting sleepers up to around 195cm tall. If height is the issue rather than width, a king solves it at less cost in floor space than a super king.

Which Size Suits Your Room

A king size frame measures roughly 155cm to 165cm wide externally depending on rail construction, and a super king 185cm to 195cm. Add 60cm of walking space on each side you use and you need a wall to wall span of around 2.8m for a king and 3.1m for a super king.

Lengthways, allow the frame length plus 70cm at the foot if that space is a route to a window, ensuite or wardrobe. That means around 2.8m of room length as a working minimum for either size.

Doorways and stairs matter too. A super king mattress is 180cm across and does not bend, so pocket sprung and hybrid models in that size need a straight run through the house. Rolled foam mattresses and split base divans get around this problem, which is worth checking before ordering if your stairwell has a tight turn.

If a king fits your room, our king size wooden beds UK sale range covers timber frames at the 150cm standard. For the larger size, the super king size fabric beds UK sale selection lists external dimensions on every product page so you can check clearances properly.

What Larger Beds Change in Practice

The obvious benefit is undisturbed sleep. Couples with different sleep patterns, or who sleep with a child or a dog part of the night, gain the most from extra width. Someone who moves frequently disturbs a partner far less at 90cm each than at 67.5cm each.

The less obvious effect is on the rest of the room. A wider bed pushes bedside furniture towards the corners, changes the scale of what looks right beside it, and reduces the wall length available for wardrobes. In a room of around 3.5m width, a super king leaves little room for anything beyond slim bedside cabinets.

Bedding costs and laundry also change. King and super king duvets and sheets take up more washing machine capacity and take longer to dry, which matters in homes without outdoor drying space. It is a small point but a real one for many households.

Mattress and Base Considerations

Wider mattresses need better central support. Any bed of king width or above should have a centre rail with its own leg or legs, otherwise the slats flex in the middle and the mattress develops a dip along the join. Check that detail on the product specification rather than assuming it is present.

Zoned or dual tension mattresses become more useful at larger sizes, since the extra width makes it practical for two sleepers to have different support without either feeling the transition. Pocket sprung constructions isolate movement better than open coil, which matters more as the bed gets wider and two people are more likely to be moving independently.

Depth affects the finished look at these sizes. A shallow mattress on a wide low frame can look flat, while a deep mattress balances the visual weight of a broad headboard. You can compare depths across our modern mattresses UK sale range and match them to the frame height listed on each bed.

Getting the Bedding Right

British king bedding fits a 150cm by 200cm mattress, and super king bedding fits 180cm by 200cm. Do not substitute an American queen set for a British king: the length difference of three centimetres pulls fitted sheets off the corners and the duvet proportions sit wrong.

A British king duvet measures 225cm by 220cm and a super king 260cm by 220cm. Both give proper overhang on their respective mattresses. Using a double duvet on a king is a common false economy that leads to both sleepers pulling at the edges through the night.

You can see the complete British size range together at Furniture in Fashion, which makes comparing a king against a super king much easier than working from separate listings. We offer free delivery to most UK mainland postcodes, and Returns are available up to 30 days.

Frequently Asked Questions

Is a king bigger than a queen in the UK?

Yes. A UK king measures 150cm by 200cm. Queen is not a UK standard, and when used here it refers to the American size of roughly 152cm by 203cm, which is very close to a UK king rather than smaller than it.

Is an American king the same as a UK king?

No. An American king measures approximately 193cm by 203cm, which is much wider than a UK king and closer to a UK super king at 180cm by 200cm.

How much extra room do I need for a king over a double?

A king frame is around 15cm to 20cm wider externally than a double, so you need that much extra wall to wall span while keeping the same walking space on each side.

Can I fit a super king in a standard UK bedroom?

Only in larger main bedrooms. You need roughly 3.1m of width to keep 60cm of walking space on both sides, plus wall space for storage.