The best mattress for a double bed is exactly 135 × 190cm — the UK standard double — chosen for the lighter sleeper's comfort and the heavier sleeper's support. On a double's 67.5cm of width each, motion transfer matters more than any other spec.
The size trap
Check the measurement, not the word. A UK double mattress is 135 × 190cm; an EU double is 140 × 200cm. The wrong one leaves a visible gap on the base or overhangs it. If your frame is ours, it is the UK standard. Every dimension is in our UK bed size guide.
Why doubles are the hardest size to buy for
A double gives two adults 67.5cm each — less width than a child has in a single bed. There is no room to escape a partner's movement, so the mattress has to absorb it: this is where individually pocketed springs earn their place, responding only to the weight directly above them. It is also why a too-firm double punishes side sleepers — there is nowhere else to lie.
Choosing between ours
Structure and alignment first — the Arete 1500. Deep cushioning — the Laurel Comforto 2500. Natural fillings that breathe — the Laurel Natural 2500. The hotel pillow-top feel — the Tranquility 3000. All made in double, all with a 60-night free trial and a 5-year warranty — and the trial is the honest answer to every "best mattress" list on the internet: no chart predicts night 30. Sleep on it.
For the fuller method — position, build, temperature — read how to choose a mattress, or browse our double beds and every mattress we make.
What size is a double mattress?
135 × 190cm — 4ft 6in by 6ft 3in, the UK standard double.
What firmness suits couples?
The heavier sleeper sets the support; the lighter sleeper sets the surface. Firm springs beneath a genuinely cushioned surface suit most couples better than a uniformly hard mattress.
Will an EU double mattress fit a UK double bed?
No — an EU double is 140 × 200cm, so it overhangs a UK frame. Match the standard to the frame.
How does the 60-night trial work?
Sixty nights to sleep on the mattress at home, free. Every mattress we sell carries it, along with a 5-year warranty.