UK Long Double Mattresses

The UK long double (135 x 200cm) is a standard double with king length: the fix for couples who like their room layout but not the short mattress.

Why choose a long double?

  • You get king length at double width: an extra 10cm of legroom in a familiar footprint.
  • It suits taller couples in rooms that won't take a king's extra 15cm of width.
  • The width matches the 135cm double you may already own, so the room layout stays the same.
  • A standard double headboard still matches the width.

Allow at least 2.6m x 2.9m; use 135 x 200cm fitted sheets from specialist ranges, with a standard double duvet.

All UK Long Double mattresses

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Emma Original Mattress

Hybrid, Medium Firm, 25cm, 200-night trial
Size: King size
Mattress Next Day
£599
£423
Mattress Online
£599
£453
Mattress Man
£559
+ 1 more retailer
Currently out of stock at all retailers
£216 cheaper than Emma direct
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Oops! Something went wrong while submitting the form.

Why choose a long double?

  • You get king length at double width: an extra 10cm of legroom in a familiar footprint.
  • It suits taller couples in rooms that won't take a king's extra 15cm of width.
  • The width matches the 135cm double you may already own, so the room layout stays the same.
  • A standard double headboard still matches the width.

Allow at least 2.6m x 2.9m; use 135 x 200cm fitted sheets from specialist ranges, with a standard double duvet.

How big is a long double mattress?

135 x 200cm: standard UK double width with king length.

Long double or king?

A king adds width as well as length. The long double is for rooms where the extra 15cm of width won't fit but a sleeper needs the legroom.

What bedding fits?

135 x 200cm fitted sheets from specialist ranges. A standard double duvet covers the top.

Will a long double fit my double bed frame?

Only if the frame has a 200cm internal length. Most UK double frames are built for 190cm mattresses, so a long double usually needs a long frame or a divan base to match.