What Length Is a Single Bed?

Straight to the Answer

A standard UK single bed is 190cm long. That is 6ft 3in, or 75 inches. The standard width is 90cm, which is 3ft or 36 inches.

There is also a long single, sometimes called an extra long single, which keeps the 90cm width but extends the length to 200cm, matching a king size bed for legroom. It is less common in shops but readily available, and it solves a specific problem well.

Why Length Matters More Than Width Here

Width is largely a comfort question. Length is a fit question, in two senses.

First, the sleeper. A comfortable rule is to allow around 10cm to 15cm of mattress beyond your height. At 190cm, a standard single suits sleepers up to roughly 175cm to 180cm tall. Beyond that, feet start to reach the end, and the bed stops working long before the sleeper stops growing.

Second, the room. Singles frequently go into alcoves, under sloping ceilings or along a wall between a window and a door. In those positions the length is fixed by the architecture, and a few centimetres decides whether the bed fits at all.

Standard Single Versus Long Single

The comparison is simple:

Standard single: 90cm x 190cm (3ft x 6ft 3in)

Long single: 90cm x 200cm (3ft x 6ft 6in)

Ten centimetres does not sound like much, and for a child it is irrelevant. For a teenager approaching adult height, or an adult over about 180cm using a single in a spare room, it changes the bed from tolerable to comfortable.

The trade off is bedding. Standard single bedding is stocked everywhere. Long single bedding is a smaller market, and fitted sheets in particular need to be bought to size rather than borrowed from the standard range. Duvets are less of a problem, since a single duvet at 135cm by 200cm already suits both lengths.

Frame Length Against Mattress Length

The 190cm figure describes the mattress. The frame is always longer, and by a variable amount:

Simple metal frames: often 195cm to 198cm overall

Wooden slatted frames: typically 196cm to 202cm

Upholstered beds with a padded headboard: 200cm to 208cm

Frames with both headboard and footboard: can reach 210cm

Width follows the same pattern, growing from 90cm to somewhere between 94cm and 100cm depending on rail depth. If the bed is going into a fixed space, take the overall external dimensions from the product listing. Our modern single wooden beds UK sale listings show both the mattress size and the full frame footprint, which makes alcove planning far more reliable.

Fitting a Single Into an Alcove

Alcoves are where careful measuring pays off. Walls are rarely square, plaster is rarely flat, and skirting boards steal a centimetre or two at floor level.

Measure the width at three heights: at skirting level, at mattress height and near the top of the headboard. Use the smallest figure. Then subtract at least 2cm of tolerance so the frame can be manoeuvred into position rather than wedged.

Length needs the same treatment if the bed runs between two fixed points, such as a chimney breast and an external wall. And check the headboard: a bed with a slim bolt on headboard will fit a tight alcove where a deeply padded one will not.

Clearance Around a Single Bed

Singles usually sit in rooms that also need to work as a study, a play space or occasional storage, so clearance planning is about the whole room rather than just the bed.

Allow 50cm to 60cm along the open side for comfortable access

Keep 75cm in front of hinged wardrobe doors

Leave enough at the foot for a desk chair to pull out, if a desk sits there

Push the bed against the longest available wall in narrow rooms

In a child’s room, the floor matters more than in an adult bedroom. A bed pushed lengthways against the wall frees a usable rectangle of open floor, which is worth more than symmetry.

Bunk Beds and Cabin Beds

Bunks almost always use standard single mattresses at 90cm by 190cm, though mattress depth is the critical figure rather than length. Most bunk beds specify a maximum depth, commonly around 15cm to 20cm for the top bunk, to keep the safety rail high enough relative to the sleeping surface.

Overall footprint is longer than the mattress, usually around 198cm to 205cm, and height needs checking against the ceiling, particularly in a loft room or a bedroom with a low ceiling. Our modern bunk beds UK sale range lists overall height alongside footprint, which is the figure to compare against your ceiling.

Cabin beds and mid sleepers use the same mattress size while raising the sleeping surface to create storage or desk space underneath. In a genuinely small single room, they are often the most efficient use of the floor available.

Storage and Furniture Around a Single

Single bedrooms tend to serve several purposes, so the storage has to be efficient rather than generous. Beds with built in drawers remove the need for a separate chest, which in a small room can be the difference between having a desk and not.

Where a separate chest is needed, a taller narrow unit uses less floor than a wide low one for the same capacity. Our modern wooden chest of drawers UK sale range includes narrow widths suited to smaller rooms.

For a child’s or teenager’s room being furnished from scratch, working from a coordinated range keeps the finishes consistent without cross referencing colours. Our modern childrens furniture UK sale pages group beds, drawers and desks in matching styles.

Mattress Choice for a Single

Length and width are set by the standard, but depth is yours to choose, and it affects both comfort and fit. A shallower mattress of 16cm to 20cm suits bunk beds, cabin beds and frames with a low side rail. A deeper mattress of 22cm to 28cm gives more comfort for an adult but sits higher, which can look out of proportion on a low framed single and may compromise a bunk’s safety rail.

For a growing child, replacing the mattress rather than the whole bed is usually the more sensible upgrade path, provided the length still suits their height.

When to Move Up a Size

The signs are usually clear. Feet reaching the footboard, bedding pulled loose every night, or a teenager who now needs somewhere to sit as well as sleep. At that point the options are a long single at 200cm, which keeps the narrow footprint, or a small double at 120cm by 190cm, which adds width but no length.

If height is the issue, choose the long single. If space to spread out is the issue, choose the small double. If both apply and the room allows it, a standard double at 135cm by 190cm still has the same 190cm length, so it will not solve a legroom problem on its own. Our modern beds UK sale range covers all these sizes so footprints can be compared directly.

Buying a Single Bed

We stock single beds in wood, metal, fabric and high gloss finishes, alongside bunk beds and storage designs, with full frame and mattress dimensions on every listing. You can shop modern furniture for the whole home at Furniture in Fashion, and we offer free delivery to most UK mainland postcodes.

Sheet Sizes and Depth

Single fitted sheets are cut for a 90cm by 190cm mattress, usually with a depth allowance of around 25cm to 30cm. Single duvets are commonly 135cm by 200cm, which is why a single duvet already suits both a standard and a long single: the duvet length was never the limiting factor.

For a long single at 200cm, the fitted sheet is the item to buy to size. Using a standard single sheet on a long single mattress leaves it straining at the corners, and it will lift off within a night or two.

Base Support in Bunks and Cabin Beds

Single bases are the least demanding of any size, but bunk beds change the calculation. Slats need to be secured rather than loose, because a top bunk mattress can shift when a child climbs in.

Check the stated maximum mattress depth carefully. Bunk safety rails are designed to sit a set distance above the mattress surface, and a mattress deeper than specified reduces that margin. It is the most common mistake made when replacing a bunk mattress years after buying the bed.

Making a Single Room Work Twice

Single bedrooms are rarely used only for sleeping. They double as studies, hobby rooms and occasional guest rooms, so the layout has to serve more than the bed.

Two arrangements consistently work in narrow British single rooms:

Bed lengthways against the longest wall, with a desk on the opposite wall and a narrow wardrobe at the far end

Bed under the window with storage on both flanking walls, which suits rooms where the door opens into a corner

Both keep one uninterrupted floor route, which is what makes a small room feel usable rather than full.

Frequently Asked Questions

What length is a standard single bed?

190cm, which is 6ft 3in or 75 inches. The standard width is 90cm.

How long is a long single bed?

200cm, which is 6ft 6in. The width stays at 90cm, so only the length changes.

Is a single bed long enough for an adult?

For most adults up to around 180cm tall, yes. Taller sleepers are usually more comfortable in a long single at 200cm.

Do bunk beds use standard single mattresses?

Yes, 90cm by 190cm. Check the maximum mattress depth specified for the top bunk, since the safety rail height depends on it.

How much space should I allow for a single bed frame?

Around 195cm to 208cm in length and 94cm to 100cm in width, depending on the frame and headboard design. Always use the overall figure from the listing.

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