European small double mattresses

What is a 120 x 200 mattress?

A 120 x 200 mattress is a European small double: 120 cm wide and 200 cm long, or 4ft x 6ft6. It's the same width as a UK small double (120 x 190 cm) but 10 cm longer, so the two aren't interchangeable.

You'll mostly find 120 x 200 cm, sometimes listed as a euro small double, on beds from European brands, including some teenage and guest beds. The name is where mix-ups start, because a bed sold as a small double could be either size. Measure the length inside the frame: if it's 190 cm, you need a UK small double mattress instead.

Will a UK small double fit a 120 x 200 bed?

A UK small double fits the width of a 120 x 200 bed but not the length: at 190 cm long, it leaves 10 cm of empty frame at one end.

That space lets the mattress slide about, and pillows and bedding end up down the gap. If the mattress you have now keeps creeping and leaves bare slats at one end, measure the frame: it may well be a 120 x 200. On a teenager's high sleeper or any child's bed, a gap is a safety issue as well, so match the frame exactly. Going the other way, a 120 x 200 cm mattress is 10 cm too long for a UK small double frame and won't lie flat inside it.

Who is a 120 x 200 mattress good for?

A 120 x 200 mattress is good for one adult who wants more room than a single, and for tall teenagers moving up from a single bed. It's 30 cm wider than a single and long enough for people up to about 185 to 190 cm tall.

That height comes from a simple rule: a mattress should be about 10 to 15 cm longer than the tallest person sleeping on it. A UK small double, at 190 cm, suits people up to about 175 to 180 cm, so a teenager who's shooting up gets more room to grow on a 120 x 200. Our teen mattresses page has more on firmness and support at that age.

It also makes a roomy guest bed for a smaller spare room. Leave around 60 to 70 cm beside the bed on any side you need to walk past.

Can two people sleep on a 120 x 200 mattress?

Two people can sleep on a 120 x 200 mattress for the odd night, but each gets 60 cm of width, 10 cm less than a toddler's cot bed mattress.

The extra length helps tall guests but adds no width. Even a UK double (135 x 190 cm) gives 67.5 cm each, though it's 10 cm shorter. For two people every night, a European double mattress (140 x 200 cm) gives 70 cm each, and a European king (160 x 200 cm) gives 80 cm each.

What sheets fit a 120 x 200 mattress?

A 120 x 200 mattress needs fitted sheets and a mattress protector made for 120 x 200 cm. UK small double sheets are cut for 190 cm and will be 10 cm short.

For the duvet, a standard UK double (200 x 200 cm) is the usual choice on a small double bed of either kind, with a good overhang each side. Whatever sheets you choose, the pocket needs to be deeper than the mattress.

Not sure which small double you have? Our odd size mattresses page explains how to measure a frame properly, and our European size mattresses guide shows how the whole system fits together. This is a family business, and checking a customer's measurements is part of the job: send yours through our contact page.

Written by the Mattress Town team. Last updated 9 October 2026.