UK Bed Sizes Explained: A Complete Chart

Few furniture decisions catch people out quite like bed size. The names sound straightforward — single, double, king — yet the actual dimensions are surprisingly easy to misjudge, and a mattress that fits beautifully in the showroom can leave you with no room to open a wardrobe at home. This guide sets out every standard UK bed and mattress size in centimetres, explains exactly who each one suits, and shows you how to match a bed to your room, your sleeping habits and your budget. By the end you will know precisely which size to order with confidence.

1. Why bed size matters more than you think

A bed is the single largest piece of furniture in most homes, and it stays with you for a decade or more. Get the size right and you sleep better, the room feels balanced, and everything around it — the wardrobe doors, the chest of drawers, the walking space — works as it should. Get it wrong and you live with the consequences every day: an elbow in your partner’s ribs, a frame you have to shuffle sideways past, or a grand super king that swallows a box room whole.

The most common mistake is choosing a bed by name alone. “Double” sounds generous, but a UK double gives each of two adults just 67.5 cm of width — narrower than a standard single mattress. Sleep is restless when there isn’t room to turn over without disturbing the person beside you, so couples who can spare the floor space almost always benefit from sizing up. Equally, a king crammed into a small room can feel cramped and leave no room for bedside tables.

There is also the question of fit. A mattress is awkward to return once it has been slept on, so measuring your room properly before you order — and knowing the real footprint of the frame, not just the mattress — is what separates a smooth delivery from a stressful one. The sections below give you the numbers to do exactly that.

2. The complete UK bed size chart

UK bed sizes are still commonly described in imperial feet and inches, while the mattresses themselves are made to metric dimensions. The table below shows both, so whichever way a product is labelled you can cross-check it. These are the standard sizes you will find across the UK furniture trade; bear in mind that frame and divan footprints add roughly 5–15 cm to each dimension, which we cover in section 7.

Note the two length tiers: small single through double are all 190 cm long, while king and above step up to 200 cm. That extra 10 cm matters if anyone in the bed is over about 1.8 m (5’11”), because a 190 cm mattress leaves little clearance for feet and pillows. Length, not just width, is part of getting the size right.

3. Small single and single beds

The small single at 75 × 190 cm is the narrowest standard size and earns its place in tight spaces: box rooms, cabin and mid-sleeper beds for children, and rooms where a doorway or radiator steals width. It comfortably suits a young child and buys back precious floor space for a desk or toy storage. For most growing children, though, a full single is the wiser long-term buy.

The single at 90 × 190 cm is the UK’s workhorse size, suiting children and teenagers, single adults, and spare or guest rooms where you want a proper bed without dominating the room. The mattress is light enough to turn easily, and bedding is the cheapest and most widely stocked of any size. If a child is likely to keep the bed into their teens, a single beats a small single — those few extra centimetres of width matter as they grow.

Two singles also have a clever use in guest rooms: a zip-and-link arrangement, where two single mattresses sit on one base and can be pushed together to form a super king or separated into twin beds — the most flexible setup for a room that hosts couples and friends alike. Browse the full range of single beds to compare frame styles and storage options.

4. Small double and double beds

The small double — sometimes called a “queen” in the UK, though confusingly that word means something different in the US — measures 120 × 190 cm. It is an underrated size. For a single adult who likes room to stretch out, it offers far more space than a single without the footprint of a full double. For couples in a snug room it can work as a compromise, though at 60 cm of width each it is genuinely cosy for two.

The double at 135 × 190 cm is the size most British couples picture as a “normal” bed, and it remains the country’s best-seller. It fits the majority of bedrooms, takes widely available bedding, and suits couples who don’t mind sleeping close. The honest caveat is width: each person gets 67.5 cm, narrower than a single mattress. If either of you is a restless or light sleeper, or simply values space, it is worth considering whether a king would serve you better.

A double is also a sound choice for a generous single room, a teenager’s bedroom with space to spare, or a guest room you want to feel a touch more luxurious. Explore the double beds range for everything from classic upholstered frames to space-saving designs.

5. King size beds

The king at 150 × 200 cm is the size we most often recommend to couples who have the room for it. Compared with a double it adds 15 cm of width and 10 cm of length, which translates to a noticeably calmer night: more room to turn over, less disturbance from a partner, and proper clearance for taller sleepers. For many couples this is the size that finally makes a shared bed feel like enough space.

A king does ask more of your room: aim for a bedroom at least 3 m × 3.4 m to take one with comfortable walking space and bedside tables on both sides. The frame footprint, mattress depth and any storage mechanism all add to the chart figures, so measure with the real product dimensions in mind. King-size bedding is widely available, if slightly pricier than double.

King-size frames are also where storage really pays off. An ottoman bed lifts the entire mattress on gas struts to reveal a deep storage cavity underneath — ideal for spare bedding, suitcases or seasonal clothing, and a brilliant way to reclaim space in a master bedroom. See the full king size beds collection to compare frame heights, headboard styles and storage formats.

6. Super king and emperor beds

The super king at 180 × 200 cm is the luxury choice for master bedrooms with space to spare. At 90 cm of width each, two adults effectively get the room of a single bed apiece — the gold standard for undisturbed sleep, and a favourite for anyone who shares with children or pets on the occasional morning. It needs a substantial room, ideally at least 3.4 m × 3.4 m, to sit comfortably with furniture around it.

Beyond the super king sits the emperor at around 200 × 200 cm (with larger bespoke sizes available). These are statement beds for large, high-ceilinged rooms, and they carry a practical catch: bedding and mattresses in these sizes are speciality items, less widely stocked and more expensive, so factor that into the long-term cost. For most homes the super king is the sweet spot between indulgent space and everyday practicality.

One word of caution with the largest sizes: access. A rigid super king or emperor mattress can be hard to manoeuvre up a tight staircase or around a sharp landing. Check your route before ordering, and if it’s awkward, look at a rolled or vacuum-packed mattress, or a zip-and-link pair that arrives as two manageable halves.

7. Mattresses, depth and frame footprint

The chart dimensions describe the mattress surface, but two further measurements decide whether a bed truly fits your room and feels right to sleep on: the frame footprint and the mattress depth.

• Frame footprint. A bed frame or divan is always larger than its mattress. Slatted and upholstered frames typically add 5–10 cm to width and length; ottoman and storage beds, and frames with thick padded surrounds, can add 10–15 cm or more. Always check the product’s listed external dimensions, not just the mattress size, when measuring your room.
• Mattress depth. UK mattresses range from around 18 cm for a basic foam model to 30 cm or more for a deep pocket-sprung design. Depth affects how high you sit, whether your standard fitted sheets will reach (look for deep-fitted sheets above about 25 cm), and how the bed pairs with your headboard.
• Total height. Frame height plus mattress depth gives your sitting height. Around 55–65 cm from floor to mattress top suits most people for getting in and out easily — higher can feel grand but harder to climb into, lower can be a strain on knees.

Mattress choice is a guide in its own right, covering firmness, fillings and how to match a mattress to the way you sleep. If you’re buying frame and mattress together, it’s well worth reading our how to choose a mattress guide alongside this one, and browsing the full mattresses range to pair the right comfort grade with your chosen size.

8. Matching the bed to your room

The right size is the largest bed your room can take while leaving comfortable clearance around it. As a working guide, aim for at least 70 cm of walking space on any side you need to access, plus room for bedside tables and for wardrobe and drawer fronts to open fully. Here is how the standard sizes map to typical UK rooms:

1. Box room (around 2.4 m wide): small single or single, often with a storage or cabin frame to free up floor space.
2. Small double bedroom (around 2.7–3 m): a double works, or a small double if you want easier access on both sides.
3. Average double bedroom (around 3–3.4 m): a double comfortably, or a king if you keep bedside furniture compact.
4. Master bedroom (3.4 m and over): king or super king, with room for tables either side and a chest of drawers or bench.

Think about the whole room, not just the bed. A king pushed into a small space leaves you climbing over the footboard to reach the window; a single adrift in a large room looks lost. The bed should anchor the room and leave the rest of your bedroom furniture — wardrobes, drawers, bedsides — usable without a squeeze. In compact rooms, prioritise clearance over sheer size and choose storage beds to keep the floor clear.

Still unsure whether your chosen frame will fit? Our Will It Fit tool walks you through measuring your room and access route step by step, so you can order knowing the bed will arrive, get up the stairs and sit comfortably in the space.

9. Buying with confidence

Choosing a bed size is a decision you live with for years, so it should be made without pressure. Every bed at Elystra Living comes with fast delivery, so your new bed arrives promptly and you’re not left waiting weeks. If you change your mind, our 30-day returns promise gives you genuine breathing room to be sure the size is right for your room and the way you sleep.

We also know a quality bed is an investment, which is why you can spread the cost with Klarna in interest-free instalments — letting you choose the size that truly suits you, rather than the one that fits this month’s budget. Whether you’re after a space-saving single, a best-selling double or a luxurious super king, you can take your time, measure properly and order knowing you’re covered. Browse the full range of beds to find the size and style that’s right for your home.