How Wide Is a Single Bed UK?

Ninety centimetres, or three feet

A standard UK single bed is 90cm wide and 190cm long, which converts to 3ft by 6ft 3in. Those measurements refer to the mattress, so the frame itself will usually be a few centimetres wider and longer depending on the thickness of its sides and whether it has a footboard.

Two variations exist alongside the standard size. A short single keeps the 90cm width but drops the length to around 175cm, which suits box rooms and cabin beds. A small single, sometimes described as a narrow single, is 75cm wide by 190cm long and is most often used in very tight spaces or on the top bunk of a compact bunk frame.

How a single compares with other UK sizes

Set against the rest of the British range, the single is the narrowest adult size in regular use. A small double is 120cm, a double is 135cm, a king is 150cm and a super king is 180cm. What that means in practice is that a super king gives each of two sleepers exactly the width of one single bed.

Length is where the single shares ground with larger sizes. At 190cm it matches the small double and the standard double, so moving up from a single to either of those sizes changes only the width of your layout. Moving to a king adds 10cm of length as well, which is the reason taller teenagers often need a king frame rather than simply a wider one. You can compare the sizes side by side in our modern beds UK sale collection.

Where single beds work best

Children’s rooms are the obvious home for a single, and the size stays useful for years. It leaves room for a desk, a wardrobe and floor space to play in, which a wider bed would take away.

Guest rooms are the second common use, particularly where a room needs to accommodate either one visitor or two. Two singles placed with a gap between them offer flexibility that a double cannot, and some frames can be pushed together to form a wider sleeping surface when needed.

Bunk beds and cabin beds rely on the single footprint too. In a shared child’s room, a bunk frame doubles the sleeping capacity of the same floor area, and our modern bunk beds UK sale range is built around standard single mattresses so replacements are easy to find.

Finally, the single works in small adult bedrooms, studio flats and loft rooms where a wider bed would block the only usable route through the space.

Planning a room around a single bed

Because a single is narrow, the temptation is to assume it fits anywhere. Access is still the deciding factor. Allow at least 60cm along the side you get in and out from, and if the bed sits under a window, check that the sill height and any opening handle clear the mattress.

Pushing a single lengthways against a wall frees up the most floor space and is the usual choice in a box room. If you do this, choose a frame with a solid side rather than open slats, since a mattress against a cold external wall can gather condensation. Leaving a two or three centimetre air gap behind the bed helps.

Storage is where a single earns its place. Under bed drawers, a storage base or a small ottoman single frame holds bedding and clothes that would otherwise need another piece of furniture. Vertical storage does the rest, and a tall narrow wardrobe from our modern 1 door wardrobes UK range fits alcoves that a double wardrobe cannot.

Bedding for a single bed

Fitted sheets should be bought in single size to match the 90cm width, and if your mattress is deeper than about 25cm, look for a deep fitted sheet so the corners stay put. A single duvet measures 135cm by 200cm, which gives a comfortable overhang on both sides of a 90cm mattress.

Short single beds need their own sheets, since a standard single fitted sheet will bunch on a 175cm mattress. Small single beds at 75cm wide are similarly particular, and it is worth checking sheet availability before choosing that size, because the range is limited.

Pillows are simpler: one standard pillow suits a single bed, and two look crowded unless the headboard is unusually wide. A folded throw across the lower third of the bed adds enough depth to stop the arrangement looking flat.

Choosing a single frame

Frame material changes how a small room reads. Metal frames keep sight lines open because you can see the floor continuing beneath them, which helps a narrow room feel wider. Wooden frames add warmth and are hard wearing in a child’s room. Upholstered frames soften the space and give a headboard you can lean against comfortably for reading.

Consider the footboard. A frame without one looks less bulky and lets a taller child stretch out, while a footboard keeps bedding contained. In a room where the bed sits in an alcove, measure the alcove against the external frame dimensions rather than the mattress size, since a footboard can add several centimetres.

Guest room use suits a divan base with a separate headboard, because the base can be pushed together with a second one when two visitors want a wider bed. Our range of single wooden beds UK sale covers both slatted frames and designs with storage built in, and the wider bedroom collection at Furniture in Fashion includes matching cabinets and drawers.

Mattress choice for a single

The narrow width makes single mattresses light and easy to turn, which is a genuine advantage. For a child, a medium feel with good edge support works well, since children tend to sleep near the edges and sit on the side of the bed. Open coil and pocket sprung options both suit this use, and a washable protector is worth adding.

For an adult using a single nightly, choose on firmness rather than price alone. Side sleepers usually want a softer surface at the shoulder, while back sleepers prefer firmer support. Breathable covers help in loft rooms, which run warm in summer. Our mattresses UK sale range lists depth and firmness for each single model so you can match it to the frame.

When to move up from a single

Children usually stay comfortable in a single until their mid teens. The signals that a change is due are simple: feet reaching the footboard, bedding pulled loose most mornings, or a complaint about not being able to turn over. Height is the more reliable measure than age, and once someone passes about 175cm the 190cm length starts to feel short.

For adults, the question is usually about sharing rather than size. If a partner stays regularly, a small double at 120cm is the smallest sensible step up and often fits where a full double will not. If the room can take 135cm, a double gives both people a workable amount of space. Either way, check the clearances again before ordering, because the extra width comes off the walking space rather than out of thin air.

Two singles or one larger bed

Guest rooms present a genuine choice. Two singles handle more combinations of visitor, work well for siblings sharing and let you leave a gap for a bedside table between them. The drawback is that they need more total floor area than one double, since each bed wants its own access.

One larger bed uses the space more efficiently and looks more generous, but it limits who can use the room comfortably. A useful compromise is two single divan bases with a zip and link mattress set, which gives you two separate beds most of the time and a 180cm super king surface when you need it. That flexibility is why hotels use the arrangement, and it works just as well in a spare room at home. The only requirement is that both bases are the same height and the mattresses are the same depth, otherwise the join is noticeable.

Frequently asked questions

What are the exact dimensions of a UK single bed?

90cm wide by 190cm long, which is 3ft by 6ft 3in. That measurement refers to the mattress rather than the outer frame.

Is a single bed big enough for an adult?

Yes for one person, though 90cm is narrow if you move a lot in your sleep. Anyone who wants more room without much extra floor space usually looks at a small double at 120cm.