A small double bed measures 120cm by 190cm (4ft by 6ft 3in) in the UK, sitting between a single and a standard double. It is the go-to for box rooms and guest bedrooms.
Key takeaways
- 120 x 190cm (4ft x 6ft 3in) is the UK small double size.
- 30cm narrower than a standard double, 30cm wider than a single.
- Needs a 120cm mattress; standard double sheets will swamp it.
- Best for box rooms and guest rooms; snug for two adults.
- Leave 60cm clearance each side if you can.
How Big Is a Small Double Bed in CM and Feet?
120cm wide by 190cm long, or 4 feet by 6 feet 3 inches. The mattress matches the frame exactly, so shop for a 120 x 190cm mattress and the fit will be right.
UK Bed Size Comparison Table
Here is how the small double sits among standard UK bed sizes, all at a glance:
Single: 90 x 190cm (3ft x 6ft 3in). Small double: 120 x 190cm (4ft x 6ft 3in). Double: 135 x 190cm (4ft 6in x 6ft 3in). King: 150 x 200cm (5ft x 6ft 6in). Super king: 180 x 200cm (6ft x 6ft 6in).
The small double gives each of two sleepers 60cm of width, versus 67.5cm in a standard double and 75cm in a king. That 7.5cm per person is the difference between cosy and cramped for many couples.
Is a Small Double Big Enough for Two Adults?
It suits couples who sleep close or as a short-term solution, but 60cm each is snug for nightly use. If either partner is a restless sleeper, broad-shouldered, or runs hot, a standard double or king will be noticeably more comfortable.
For one adult, a small double is generous: sprawling room without the footprint of a double. It is also a popular choice for taller teenagers who have outgrown a single but do not need a full double.
What Bedding Fits a Small Double Bed?
Buy small double bedding: a 120cm fitted sheet, a standard double duvet (200 x 200cm) for generous overhang, and normal pillowcases. A double duvet on a small double drapes nicely and stops midnight duvet tug-of-war.
Mattress protectors and fitted sheets must be the 120cm size; a 135cm sheet will bunch and wrinkle. Pillows are standard size regardless of bed.
Room Fit Guide: Will It Fit Your Bedroom?
The bed needs a 120 x 190cm footprint. As a rule, allow at least 60cm clearance along one side for getting in and out, plus space for wardrobe doors to swing open. A 2.4m by 2.4m box room fits a small double with a compact wardrobe.
Measure twice: sketch the room on paper with the bed, door swing, and any drawers marked. Remember radiators under windows eat into usable wall length, and sloped ceilings in lofts limit where the headboard can go.
Small Double Mattress Types
All the usual mattress types come in small double: pocket sprung for bounce and airflow, memory foam for pressure relief, and hybrids mixing both. For couples, look for low motion transfer so one partner’s tossing does not wake the other.
Are Small Double Beds a UK-Only Size?
Largely yes; the 120cm width is a UK standard. The US nearest is a full/double at 137cm, and Europe commonly uses 140cm. Check exact centimetres when buying frames abroad.
Small Double Mattress Buying Guide
Set a budget first: decent small double mattresses start around £150, with premium hybrids reaching £600+. Pocket sprung suits hot sleepers and those who like bounce; memory foam suits side sleepers with joint pain; hybrids split the difference.
Check the firmness rating: medium-firm suits most adults, while lighter people and side sleepers often prefer medium. Always confirm the 120 x 190cm size on the label, as European 120 x 200cm mattresses are longer and will not fit UK frames.
Bed Frame Styles for Small Doubles
Ottoman frames are the small-room champion, swallowing duvets and suitcases under the mattress. Divan bases with drawers give similar storage more cheaply. For a lighter look, a slatted wooden frame keeps air flowing under the mattress, which helps in damp rooms.
Check the slat spacing: gaps over 7cm can let a foam mattress sag through. Upholstered headboards add comfort for readers but need 10cm of wall space; a wooden headboard sits flusher.
FAQ
What mattress size for a small double?
120 x 190cm. A 135cm double mattress will not fit.
Can two people sleep comfortably in one?
Short term yes; for nightly use most couples prefer a standard double.
Is it the same as a three-quarter bed?
Essentially yes; three-quarter is the older name for 120cm.
What duvet size goes on it?
A 200 x 200cm double duvet drapes nicely.
How much smaller than a king size?
A 150cm king is 30cm wider and 10cm longer.
Do small doubles cost less?
Slightly less, though the gap is small.
