MattressNextDay Ortho Support Foam Mattress
Mattress
MattressNextDay Ortho Support Foam Mattress
Size
Firmness
Extra Firm
Construction
Depth (cm)
20
Layers
2
Layer Details
- Knitted Cover. A soft knitted cover that's breathable, which means heat can escape rather than build up around you. It helps keep you at an even temperature all night.
- Reflex Foam. Reflex foam is a dense, responsive foam that conforms to the shape of your body. It offers tailored support to help improve your spinal alignment and posture.
Layer details from mattressnextday.co.uk product page, September 2026.
- A shared size for typical rooms: At 135 x 190cm, the UK double fits comfortably in bedrooms where we suggest at least 2.6m x 2.8m, leaving space for wardrobes and drawers.
- 67.5cm each for two sharing: Two people get 67.5cm each, which works well here because the extra firm foam keeps movement local rather than tipping you towards each other.
- Room for bedside tables both sides: In an average room, a UK double usually still allows a table on each side, something a UK king often rules out.
- Easier to move in: An all-foam, 20cm deep mattress in a UK double is more forgiving on turning stairs and tight landings than larger, sprung alternatives.
- Simple to dress: Double sheets and a 200 x 200cm double duvet are stocked everywhere at every price, handy if you're furnishing a whole home on a stretched budget.
- No sag between two sleepers: The dense reflex foam stays level across the full 135cm width, which means neither of you rolls into a dip in the middle.
This size suits you if...
You share the bed every night and want the traditional couples' size in a room that can't take a UK king, you prefer an extra firm surface for spinal support and don't mind trading a little width for it, or you're setting up a guest room that needs to sleep visiting couples comfortably without dominating the space.
Consider another size if...
You and your partner both like to spread out, or one of you has a broader build that makes 67.5cm each feel tight. We'd recommend the UK king instead, which gives 75cm each; allow at least 2.7m x 2.9m of room for it.
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Is the MattressNextDay Ortho Support Foam Mattress in a UK double big enough for two?
Yes, with a caveat. The UK double is 135 x 190cm, giving 67.5cm each for two people sharing. The extra firm reflex foam helps, because you won't roll towards your partner. Broader couples, or anyone over 6ft, may prefer the UK king, which is 15cm wider and 10cm longer.
What room size do I need for this mattress in a UK double?
We suggest at least 2.6m x 2.8m, with around 3m x 3m the comfortable norm. That usually leaves space for bedside tables on both sides plus a wardrobe, which is why the UK double remains the default choice for typical British bedrooms.
Will the UK double version fit up narrow stairs?
It stands a better chance than most. This is an all-foam mattress, 20cm deep, so it has some flex when manoeuvring around a turn in an older terrace or a tight new build landing. Measure your stairwell and any awkward corners before ordering, as 135 x 190cm is still a sizeable object.
Should I get this mattress in a UK double or a UK king?
The UK double suits most shared bedrooms and costs less to dress. The UK king is 15cm wider and 10cm longer, giving 75cm per sleeper rather than 67.5cm, but needs a room of at least 2.7m x 2.9m. Given this mattress is extra firm, taller or heavier couples may value the UK king's extra length.
Is a UK double a good guest room choice for this mattress?
It's a sensible one. A UK double sleeps visiting couples without swallowing the room, and the extra firm feel suits occasional use where you can't tailor firmness to every guest. Compare the retailers listed on this page for the current UK double price; the figures shown are updated as retailers change them.