Metal Double Beds or Metal Single Beds? How to Decide

The short answer is this: choose a metal double bed if the room is at least around three metres in one direction and the bed will be shared, even occasionally. Choose a metal single bed if the room is narrow, if it sleeps one child or one adult who rarely has company, or if the space needs to work as a study or dressing room as well. Everything else in the decision comes down to the way the room is used day to day.

That rule of thumb holds in most British houses and flats, but it is worth testing against your own floor plan. Our range of modern double metal beds UK shoppers can browse covers frames from slim and minimal to more decorative, so once you know the size you need, the style choice becomes far easier. Below, we walk through the measurements, the practical trade offs and the less obvious factors that tend to tip the balance one way or the other.

Start With the Standard UK Sizes

Before comparing styles, it helps to be clear about what each size actually means. In the UK, a standard single mattress measures 90 cm wide by 190 cm long. A standard double is 135 cm by 190 cm. Between the two sits the small double at 120 cm wide, which is often overlooked but can solve a surprising number of problems.

A metal frame usually adds only a few centimetres to the mattress size, which is one of the reasons metal beds work so well in tighter rooms. Upholstered frames, with their padded sides and deep headboards, can add considerably more. If floor space is the deciding factor, a slim metal frame lets you fit a slightly larger mattress than you might expect.

The figure to keep in mind is 45 cm. That is the difference in width between a single and a double. In a generous room it barely registers. In a box room or a narrow second bedroom, it can decide whether a wardrobe door opens fully or whether you can walk around the bed without turning sideways.

Measure the Room, Not Just the Wall

Most people measure the wall the headboard will sit against and stop there. A more useful approach is to mark the full footprint of the bed on the floor with masking tape, then live with it for a day or two. You will quickly notice whether you can open drawers, reach the window, or get past the end of the bed with a laundry basket.

As a general guide, aim for around 60 cm of clear floor on any side of the bed you need to walk along, and a little more at the foot if a wardrobe or chest of drawers faces it. A double works best with access from both sides, so neither sleeper has to climb over the other. With a single, it is entirely reasonable to push one long side against a wall, which frees up a large strip of floor.

That difference matters more than the mattress width alone. A single bed against the wall can leave a room feeling twice as usable, while a double bed placed centrally needs clearance on three sides. When you factor in that circulation space, the gap between the two options often grows from 45 cm to well over a metre.

Who Will Be Sleeping in It?

This sounds obvious, yet it is where many decisions go wrong. Think beyond the present moment and consider how the room will be used over the next few years.

Single adults

Plenty of single adults sleep comfortably in a single bed, particularly in a flat share or a smaller home. However, if you move around a lot in your sleep, read in bed, or simply like space to spread out, a double offers noticeably more comfort. A small double can be a sensible middle ground in rooms where a full double feels cramped.

Couples

For two adults, a single bed is not a realistic long term option. A standard double gives each person 67.5 cm of width, which is narrower than a single mattress. Many couples find this is the minimum they can live with, and some prefer to step up to a king size if the room allows.

Children and teenagers

For younger children, a single metal bed is usually the natural choice. It leaves floor space for play, and metal frames stand up well to the wear and tear of family life. Teenagers are a different case. Many outgrow a single in terms of comfort and preference, and a small double or standard double can carry them through to adulthood without needing another change.

Guests

Guest rooms are where the double versus single question becomes most interesting. A double bed welcomes couples, which is helpful if friends or family visit together. Two single beds, on the other hand, can be pushed together or kept apart, which suits visiting siblings, grandchildren or friends who would rather not share.

What a Metal Frame Brings to Either Size

Whichever size you choose, the material of the frame shapes how it sits in the room. Metal beds have a visual lightness that is hard to match with other materials. Open headboards, slim legs and a raised base let light pass under and through the frame, so even a double bed can feel less imposing in a modest room.

Metal is also practical. A powder coated finish wipes clean easily, does not absorb dust in the way fabric can, and holds up to knocks from hoovers and suitcases. For allergy sufferers, a smooth metal surface is often a more comfortable choice than an upholstered headboard.

The open base on most metal frames also leaves space underneath for storage boxes, which helps in any small room where wardrobe space is limited.

Thinking About Height and Proportion

Size is not only about width. The height of the frame and headboard affects how large the bed feels. A low double bed with a simple rail headboard can look smaller than a single with a tall decorative headboard and footboard.

In rooms with lower ceilings, which are common in older terraces and loft conversions, a lower profile frame keeps the space feeling open. In rooms with high ceilings, a taller metal headboard can fill the wall nicely and stop a double bed from looking lost.

Footboards matter too. In a narrow room, a tall footboard on a double can make the space feel shorter, so a frame without one, or with a very low one, is usually the better route.

Considering the Rest of the Room

A bed never sits on its own. Bedside tables, a wardrobe, a chest of drawers and perhaps a chair all need to fit around it. When planning your layout, look at the full range of modern bedroom furniture UK homes typically need and decide which pieces are essential.

With a double bed, two bedside tables keep things balanced and give each sleeper somewhere for a lamp and a glass of water. In a narrower room, wall mounted shelves or very slim bedside tables can do the same job without eating into walking space. With a single bed against the wall, one bedside table is enough, and the space saved can go towards a desk or a reading chair.

It is also worth checking the route into the room. Metal frames usually arrive flat packed, so stairs and tight landings are rarely a problem. Mattresses are a different story. A double mattress is noticeably harder to manoeuvre round a tight turn on the stairs than a single, so measure the narrowest point before ordering.

When a Single Bed Is the Smarter Choice

A metal single bed makes the most sense in a handful of clear situations. If the room is under around 2.5 metres wide, a single leaves far more usable floor. If the room doubles as a home office, a single bed against one wall leaves space for a desk and chair without the room feeling like a bedroom with a laptop in it.

Single beds are also the practical option in children’s rooms, where floor space for play matters more than mattress width. Our single metal beds UK sale range includes simple frames that grow with a child, from first big bed through to teenage years.

Finally, two singles can be the better choice for a guest room that hosts a mix of visitors. Flexibility often outweighs the appeal of one larger bed.

When a Double Bed Is Worth the Space

A metal double bed earns its floor space in a main bedroom shared by two people, in a guest room that most often hosts couples, and in a single adult’s room where comfort matters and the floor plan allows it.

If you are torn, look at the small double. At 120 cm wide, it offers a real step up in comfort for one adult while staying 15 cm narrower than a standard double. For a couple, it is snug, so it works better as an occasional guest bed than as a nightly shared bed.

Choosing the Right Mattress for the Frame

Whichever frame you choose, the mattress will make the biggest difference to comfort. Metal beds usually have a slatted or mesh base, which suits most pocket sprung, memory foam and hybrid mattresses. Check the slat spacing, as wider gaps can let a softer foam mattress sag over time.

For a double shared by two people of different weights, a pocket sprung or hybrid mattress reduces the feeling of a partner’s movement. For a single bed in a child’s room, a medium firm mattress that will last through growth spurts is a sensible starting point. Browsing modern mattresses UK sleepers rely on alongside the frame helps you match the two properly.

If you are weighing up a step up from a double to a larger size, our guide to UK king size bed dimensions and room planning sets out the measurements you will need to check.

A Simple Way to Decide

If you still cannot choose, run through these questions in order. Will two people regularly sleep in the bed? If yes, choose a double. Is the room narrower than about 2.5 metres? If yes, lean towards a single or small double. Does the room need to work as more than a bedroom? If yes, a single against the wall gives you that flexibility. Is this a guest room with mixed visitors? Consider two singles.

The right bed is the one that leaves the room comfortable to move around in, not simply the largest frame that will physically fit.

At Furniture in Fashion, we offer metal beds in every standard size, from compact singles to generous doubles, with free delivery to most UK mainland postcodes. Returns are available up to 30 days, which gives you time to make sure the bed suits the room.

Frequently Asked Questions

Can a double bed fit in a small bedroom?

Often, yes. A slim metal double frame takes up little more than the mattress itself. The key is to leave around 60 cm of walking space on the sides you need to use. If that is not possible, a small double is usually a better fit.

Is a single bed big enough for an adult?

For many adults, a single is comfortable, particularly for those of average height and build. Taller or broader sleepers, or anyone who moves a lot at night, tends to find a small double more comfortable.

Are metal beds noisy?

A well assembled metal bed should be quiet. Most creaks come from bolts loosening over time. Checking and tightening the fixings every few months keeps the frame solid and silent.

Should a guest room have a double bed or two singles?

It depends on who visits most. If couples are the usual guests, a double makes sense. If you host children, siblings or friends travelling together, two singles offer more flexibility.