What Is a 3/4 Bed? 3/4 Size Bed Dimensions, Width & Mattress Guide UK

You’ve measured your bedroom, ruled out a full double, and a single feels too small. Sound familiar? That awkward in-between space is exactly where a 3/4 bed earns its place and it’s one of the most overlooked bed sizes in the UK.

Also called a three quarter bed or small double, the 3/4 is 120 cm wide. Not as cramped as a single. Not as space-hungry as a double. Just right for a surprising number of bedrooms and sleepers.

In this guide, we’ll cover everything: exact 3/4 bed dimensions in cm and inches, how it compares to other UK bed sizes, which mattress you need, who it actually suits, and what to check before you buy. Whether you’re fitting out a guest room, a teenager’s bedroom, or a compact studio flat this is the only guide you’ll need.

What Is a 3/4 Bed?

A 3/4 bed, also called a three quarter bed, is a bed size between a single and a double. The typical 3/4 bed size in the UK is around 120 cm wide and 190 cm long, offering more space than a single bed without taking up as much room as a double.

This size is often chosen when a single bed feels too narrow but a double bed is too large for the room. Many people search for 3/4 size bed size, 3 4 bed width, or measurement of a 3 4 bed when trying to understand exactly how big this bed is.

In practical terms, a three quarter bed gives one sleeper extra comfort while still fitting easily into smaller bedrooms. That makes it popular in:

• compact UK homes and flats
  
• teenagers’ bedrooms
  
• guest rooms
  
• studio apartments
  

You’ll also find 3/4 divan beds, which combine this mattress size with a compact upholstered base, often with built-in storage drawers.

Put simply, a 3/4 bed size UK is designed to provide more sleeping space than a single while keeping the bed footprint manageable for smaller rooms.

3/4 Bed Dimensions: The Exact Numbers

Let’s get specific, because this is where most buyers go wrong.

Standard 3/4 bed size in cm: 120 cm × 190 cm or 120 cm × 200 cm

The width is always 120 cm. The length varies slightly by manufacturer; most UK beds are 190 cm, but many modern options (including Heaven Beds divans) are 200 cm, which suits taller sleepers much better.

In feet and inches, that’s roughly 3ft 11in wide × 6ft 3in–6ft 6in long.

Here’s how that width sits against the full UK size range:

Bed Size	Width (cm)	Width (ft / inches)	Length (cm)	Length (ft / inches)
Single	90 cm	3 ft	190 cm	6 ft 3 in
3/4 Bed (Three Quarter Bed)	120 cm	3 ft 11 in	190 cm	6 ft 3 in
Double	135 cm	4 ft 6 in	190 cm	6 ft 3 in
King Size	150 cm	5 ft	200 cm	6 ft 6 in
Super King	180 cm	6 ft	200 cm	6 ft 6 in

That 30 cm difference between a single and a 3/4 might not sound dramatic but when you’re lying in bed, it’s the difference between feeling squashed and feeling comfortable. For a single adult, 120 cm of width is genuinely restful.

What about the mattress? 3/4 Mattress Size

A 3/4 bed and mattress usually follow the same dimensions:

• 120 cm wide
  
• 190 cm long
  

You may also see this described as 3 4 size mattress dimensions when shopping online.

Because the mattress length stays the same as standard beds, bedding and duvets are often easy to match. Many sleepers simply use small double bedding.

If you’re furnishing a compact bedroom but want more space than a single bed offers, a three quarter bed often fits perfectly.

3/4 Bed vs Double Bed: Which Should You Choose?

If you’re considering a 3/4 bed, the real question is how it compares with the beds most people already know the single and the double.

A three quarter bed sits right in the middle. Wider than a single. Narrower than a double. That balance is exactly why many UK homeowners choose it when space is limited but comfort still matters.

Here’s how the sizes compare.

Bed Size	Width	Length	Best For
Single Bed	90 cm (3 ft)	190 cm (6 ft 3 in)	Children, small rooms
3/4 Bed (Three Quarter Bed)	120 cm (3 ft 11 in)	190 cm (6 ft 3 in)	Solo sleepers wanting extra space
Double Bed	135 cm (4 ft 6 in)	190 cm (6 ft 3 in)	Couples or larger rooms

When a 3/4 Bed Makes More Sense

A 3/4 size bed is often the best option if:

• your bedroom cannot comfortably fit a double
  
• a single bed feels too narrow for comfortable sleep
  
• you want a 3/4 bed and mattress for guest use
  
• you’re furnishing a studio flat or compact bedroom
  

Many buyers also choose a 3/4 divan bed because the compact base allows built-in storage drawers while still keeping the footprint manageable.

When a Double Might Be Better

If two adults will sleep in the bed regularly, a double bed usually provides the extra space needed for comfort.

But for one sleeper who values room to stretch out, the three quarter bed size is often the perfect compromise between comfort and space efficiency.

Pros And Cons Of A 3/4 Bed

✅ Pros

• Perfect for smaller rooms — fits comfortably where a double simply won’t
  
• More sleep space than a single — 30 cm extra width makes a real difference for adults
  
• Great guest room solution — suits solo guests well, works for couples in a pinch
  
• Available as a divan with storage — ideal when floor space is limited
  
• Often lower cost than a double — slightly less material, slightly less spend
  
• Works for teenagers — adult-sized comfort without dominating a smaller room

❌ Cons

• Too narrow for regular couple use — 120 cm is snug for two; most couples will want a double long-term
  
• Bedding can be harder to find — not every high street store stocks 3/4 bedding; you may need to order online
  
• Less choice than standard sizes — fewer frame styles available compared to singles and doubles
  
• Can feel undersized if you’re a restless sleeper — if you move around a lot, the extra width of a double may be worth it

The cons are real but manageable. For the right person in the right room, a 3/4 bed is a genuinely smart choice.

Who Is A 3/4 Bed Best For?

Guest rooms:
This is where a three quarter bed truly earns its keep. Guests get a proper, comfortable sleep. You don’t surrender an entire double’s worth of floor space. It’s the most-used 3/4 bed size in UK B&Bs and smaller hotels for exactly this reason, generous enough to feel like a treat, compact enough to keep the room functional.

Teenagers and young adults:
Old enough to have outgrown a single, not quite at the stage of needing a full double. A 3/4 divan bed with storage drawers is ideal here; it handles clothes, bedding, and all the other things teenagers accumulate. The 3/4 bed dimensions (120 cm wide) give real sleeping comfort without swallowing the room.

Solo sleepers in compact bedrooms:
If your room is under 10–11 m², a double may leave you squeezing past the end of the bed every morning. A 3 4 bed gives you adult comfort without the spatial squeeze. At 120 cm wide, the 3/4 bed size UK standard is specifically designed for exactly this scenario.

Studio flats and single-occupancy properties:
Where the bedroom also needs to function as a living space, every centimetre of floor area matters. A 3/4 divan bed with ottoman storage is one of the most practical configurations you can choose. You get a proper 3 4 size mattress underneath and serious hidden storage above without adding a single extra piece of furniture.

Budget-conscious buyers:
A 3/4 bed and mattress bundle typically costs less than the equivalent double setup, without a significant drop in sleeping comfort for one person. If you’re watching the budget but refuse to compromise on sleep quality, the three quarter bed size hits the sweet spot.

Back pain sufferers in smaller rooms:
A firm-based 3/4 divan bed with the right mattress can be just as supportive as any larger bed. The divan mattress base at this size offers excellent spinal support when paired with a pocket sprung or memory foam mattress; don’t assume you need to go bigger to sleep better.

A 3 4 bed is probably not for you if you’re buying for a couple as a permanent bed, or if you’re a very tall sleeper (over 6ft 4in) and need to prioritise 3/4 bed length always confirm whether the frame is 190 cm or 200 cm before ordering. That single detail catches more buyers out than any other 3/4 bed size in cm measurement.

Buying Checklist: What To Look For

Before you buy a 3/4 bed, run through this checklist. It takes five minutes and saves a lot of hassle.

Dimensions

• Confirm the width is 120 cm some brands call a small double 120 cm, others slightly vary
  
• Check the length 190 cm or 200 cm? If anyone over 5ft 10in will use it, go for 200 cm
  
• Measure your room and allow at least 60 cm clearance on the access side of the bed

Base Type

• Sprung divan base: adds softness, great with pocket sprung mattresses
  
• Platform top divan: firm, stable, better suited to memory foam
  
• Ottoman: lifts from the foot end; ideal for storage in tight spaces
  
• Standard frame: no storage, but works in most styles

Fabric & Finish

• At Heaven Beds, our 3/4 divan beds come upholstered in premium fabrics including plush velvet, soft linen, and classic chenille all available in multiple colours to suit your bedroom scheme
  
• Choose a headboard that complements the base a buttoned headboard adds luxury; a plain panel keeps it modern and minimal

Storage

• Two-drawer or four-drawer divan? Two drawers suit smaller rooms; four drawers offer maximum storage
  
• Ottoman base gives you full under-bed access better for bulkier items like duvets and suitcases

Delivery

• Check whether the base is delivered as a single piece or split a split base is much easier through narrow hallways and on tight stairwells
  
• Heaven Beds offers free UK delivery on all 3/4 divan beds, with assembly available

Mattress

• Don’t assume your existing mattress will fit confirm it’s exactly 120 cm wide
  
• Buy the mattress and base together where possible for guaranteed compatibility

3 4 bed Frequently Asked Questions

What size is a three quarter bed?

A three quarter bed is 120 cm wide. The length is typically 190 cm or 200 cm depending on the manufacturer. In feet and inches, that’s approximately 3ft 11in wide by 6ft 3in or 6ft 6in long. It sits between a standard single (90 cm) and a double (135 cm) in the UK bed size range.

How big is a 3/4 bed?

A 3/4 bed measures 120 cm × 190 cm or 120 cm × 200 cm. It’s 30 cm wider than a standard single, giving a single adult noticeably more sleeping space. The overall footprint is smaller than a double, making it well-suited to bedrooms from around 9–11 m².

What are three quarter mattress measurements?

A three quarter mattress measures 120 cm wide by 190 cm or 200 cm long. Always confirm the exact length before ordering, as this varies between manufacturers. The width is standard at 120 cm across all UK suppliers. 

What are the dimensions of a 3/4 size bed?

The standard dimensions of a 3/4 size bed in the UK are 120 cm wide × 190–200 cm long (3ft 11in × 6ft 3in–6ft 6in). The base, headboard and frame may add a few centimetres to the overall footprint, so always measure the frame dimensions not just the mattress size when planning your room layout.

Is a 3/4 a full size bed?

No. In UK sizing, a “full size” or double bed is 135 cm wide. A 3/4 bed is 120 cm wide 15 cm narrower. In American sizing, a “full” bed is approximately 137 cm wide, which is closer to a UK double. The 3/4 is its own distinct UK size, sitting between single and double.

Is there a 3/4 size bed?

Yes — the 3/4 or three quarter bed is a recognised UK bed size, measuring 120 cm wide. It’s widely available from UK bed retailers including Heaven Beds, where it comes in divan, ottoman and upholstered frame options with a choice of mattress types.

Is a 3/4 or double bed bigger?

A double bed is bigger. A UK double is 135 cm wide; a 3/4 bed is 120 cm wide — making the double 15 cm wider. For regular use by two people, a double is the more comfortable choice. For a single sleeper or guest room where space is limited, the 3/4 is often the smarter option.

What is a 3/4 divan bed?

A 3/4 divan bed is a divan-style bed (fabric-covered base + mattress) built to the 3/4 size of 120 cm wide. Like all divan beds, it typically includes optional storage drawers or an ottoman base, and sits lower to the floor than a frame bed. It’s an excellent choice for smaller bedrooms where you need both sleeping comfort and storage. 

Summary:

A 3/4 bed fills a gap that single and double beds don’t. It gives a single adult proper sleeping comfort, fits rooms that a double would dominate, and in divan form can double your storage in one go.

If your room is under 11 m², you’re furnishing a guest room, or you’re done with the cramped feel of a single, the three quarter bed is almost certainly the right choice. The dimensions work. The practicality is real. And the cost is usually lower than the equivalent double setup.

If you’re ready to find your perfect 3/4 bed, Heaven Beds has a handcrafted range of 3/4 divan beds and small double beds built in the UK, finished in premium fabrics, and delivered free to your door. Choose your size, pick your storage, and get the bed your bedroom actually deserves.