How Wide Double Bed?

The width of a UK double bed

A standard UK double bed is 135cm wide. In imperial measurements that is 4ft 6in, or 54in, which is why the trade often calls it a 4ft 6 bed. The mattress length is 190cm, or 6ft 3in.

The finished bed is wider than the mattress. With a frame around it, most double beds occupy between 140cm and 155cm of floor width, depending on how substantial the side rails are. A slim wooden or metal frame adds only a few centimetres each side. A padded upholstered frame can add closer to 10cm each side. That difference is the one that decides whether a bed fits comfortably in a British box room, so it deserves more attention than the mattress figure.

Double, small double and king compared

British bed widths climb in steps that are easy to mix up, and the small double is the one most often overlooked.

A single is 90cm, or 3ft. A small double, also called a three quarter bed, is 120cm, or 4ft. A standard double is 135cm, or 4ft 6in. A king size is 150cm, or 5ft. A super king is 180cm, or 6ft.

Lengths matter as well. Singles, small doubles and doubles are all 190cm long. King and super king sizes are 200cm. So moving from a double to a king gains you 15cm of width and 10cm of length, while dropping from a double to a small double loses 15cm of width and no length at all. In a genuinely narrow room, that small double is often the size that makes the layout work, and the designs across a modern small double fabric beds UK sale range are worth comparing before you assume a full double is the only option.

How much width each sleeper gets

Two adults sharing a 135cm double have 67.5cm each. For context, a standard single mattress is 90cm wide, so each person in a double has noticeably less room than they would have alone in a single bed.

That is perfectly comfortable for many couples, particularly those who sleep close together. It becomes harder if one or both sleepers move a great deal, if either is broad shouldered, or if a child or a pet joins the bed. In those situations the extra 15cm of a king size makes a real difference, not because it is much wider overall but because the split between two people improves to 75cm each.

Mattress construction changes the experience too. A pocket sprung mattress isolates movement so a partner turning over is felt less, which can make a double feel more generous than its measurements suggest.

The room space a double bed needs

A double bed works comfortably in a bedroom of about 2.7m by 3m or larger. It can go into smaller rooms, and frequently does in British houses, but the compromises need choosing deliberately.

Allow 60cm of clear walking space along each side you use, and closer to 75cm where the route passes a wardrobe or a chest of drawers. Leave around 90cm at the foot if a wardrobe door opens there. Check the swing of the bedroom door against the corner of the bed, as a door that catches the frame is a daily nuisance.

In a room 2.4m wide, a double bed with a 145cm outer width leaves 95cm, which is enough for a proper route on one side and nothing on the other. Placing the bed against a side wall is a legitimate answer for a single occupant, but it makes changing the bedding awkward and does not work for two people.

Mark the footprint out with masking tape before ordering. Include the headboard depth. Walk the room for a day. It is the most useful ten minutes of the whole process.

Placement in awkward British bedrooms

Older UK houses rarely offer a clean rectangle. Chimney breasts, bay windows, sloping loft ceilings and radiators all interfere with where a 135cm bed can sit.

Where a chimney breast divides a wall, the two alcoves either side are often around 100cm to 120cm, which will not take a double lengthways. The bed usually has to sit across the chimney breast itself, which loses floor depth. In a loft room, measure the ceiling height 60cm in from the low wall, because that is where a sleeper sits up in bed. A bed can fit on the floor and still be unusable.

Radiators under a window are worth avoiding at the head of the bed, both for comfort and to keep the heat circulating. If the only workable position puts the bed in front of one, a headboard that stands clear of it helps.

Bedding for a 135cm mattress

UK double bedding is cut for the 135cm by 190cm mattress. A double duvet is usually 200cm by 200cm, giving enough overhang on each side to stay put during the night.

Fitted sheets need to match both the width and the mattress depth. Depth is the part most people forget, and it varies widely: a basic foam mattress may be 18cm deep, while a pocket sprung model with a pillow top can exceed 30cm. A standard sheet on a deep mattress works loose repeatedly. Check the depth stated on the product page when you compare a double mattresses UK sale selection, because the same figure affects headboard proportions and how easy the bed is to get into.

Bedding bought abroad will not fit. An American full or double is 137cm by 190cm, close but not identical, and European sizing differs again.

Making a double bed work in a small room

If the double bed takes most of the floor, the remaining furniture has to earn its place.

Slim bedside cabinets of 35cm to 40cm keep the walking route usable where wider ones would block it. Wall mounted lights free the cabinet surface entirely. A tall narrow chest holds as much as a wide low one while taking half the floor area, so build upwards rather than outwards. Comparing the footprints across a modern chest of drawers UK sale range against your remaining wall length is a better way to plan than choosing on looks alone.

Storage under the bed is the most efficient space in a small bedroom, because the floor is already committed. A drawer base or a lifting design recovers the full area under the mattress. If a separate wardrobe simply will not fit, that under bed volume becomes essential rather than useful, and the options within a ottoman beds UK sale range fit in the same footprint as a standard base.

At Furniture in Fashion we see this scenario constantly in UK homes: a room that can take a double bed but only just. The layouts that succeed are the ones where the bed size was chosen from the tape measure rather than the wish list, and where the storage went upwards or underneath rather than along another wall. Whichever route suits your room, the wider bedroom furniture UK sale collection makes it easier to plan the whole room at once instead of piece by piece.

Frequently asked questions

How wide is a double bed in the UK?

A standard UK double mattress is 135cm wide, which is 4ft 6in. The length is 190cm, or 6ft 3in.

Is a double bed wide enough for two adults?

Yes for most couples, giving 67.5cm each. Sleepers who move a lot or who are broad shouldered often prefer the 75cm each that a king size provides.

What is the difference between a double and a small double?

A small double is 120cm wide against 135cm for a standard double. Both are 190cm long, so the difference is 15cm of width only.

What size room do I need for a double bed?

About 2.7m by 3m allows comfortable clearance on both sides. Narrower rooms can take one, but usually with a walking route on one side only.

Is a UK double the same as an American full size bed?

Almost. An American full is 137cm by 190cm, so it is 2cm wider. Bedding is cut to different standards and is not reliably interchangeable.