MattressNextDay Deluxe Memory Foam Mattress
Mattress
MattressNextDay Deluxe Memory Foam Mattress
Size
Firmness
Medium
Construction
Depth (cm)
25
Layers
2
Layer Details
- Memory Foam. Memory foam, originally designed by NASA, moulds to your body, which means your weight is spread evenly and pressure eases at your hips and shoulders. The brand describes the support as orthopaedic, meaning it aims to keep your spine in a comfortable position as the foam contours.
- Knitted Cover. A soft knitted cover sits on top, and it's breathable, which helps keep you at a more even temperature through the night. That matters with memory foam, which can otherwise feel a little warm.
Layer details from mattressnextday.co.uk product page, September 2026.
- Real space for one: The UK small double is 30cm wider than the UK single, which means a solo sleeper can shift position freely without the foam's contouring feeling confining.
- Fits compact rooms: At 15cm narrower than the UK double, it can be the difference between a door that clears the bed and one that doesn't in a box room or loft conversion.
- Sensible for guest rooms: A couple can share it for the occasional weekend stay, and the memory foam absorbs movement, so a fidgety guest is less likely to wake their partner.
- Standard 4ft size: Small double is an established UK size, so frames and fitted sheets are straightforward to find, unlike some continental widths.
- Modest room requirement: We suggest a minimum room of 2.4m x 2.8m for this size, which puts it within reach of most second bedrooms and studio flats.
This size suits you if...
You sleep alone and have outgrown a UK single, perhaps a teenager whose room can't spare the floor space a double demands, or you're furnishing a guest room where couples stay occasionally rather than nightly. It also suits a loft conversion or studio where the extra 15cm of a UK double would leave no walking space beside the bed.
Consider another size if...
You share the bed most nights, because a small double is a tight long-term fit for two. We'd recommend the UK double instead, which gives 67.5cm each for two sharing; allow at least 2.6m x 2.8m of room for it.
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Is the small double MattressNextDay Deluxe big enough for two adults?
For occasional nights, yes. At 120cm wide it works for guests or the odd shared stay, and the memory foam limits how much you feel a partner moving. For every night, two adults will feel the squeeze, and the UK double, which gives 67.5cm each for two sharing, is the better long-term choice.
Will a UK small double fit in a box room?
Usually, and that's much of this size's appeal. We suggest a room of at least 2.4m x 2.8m so you can still open the door and walk around the bed. Being 15cm narrower than the UK double, it often fits where a standard double frame simply won't.
How much bigger is the UK small double than a UK single?
The UK small double is 30cm wider than the UK single, and the two are the same length at 190cm. That extra width matters with memory foam, because the surface cradles you where you lie, so a wider mattress gives a solo sleeper noticeably more freedom to change position.
What frame do I need for this small double mattress?
Any standard 4ft frame or divan. The small double is a common UK size, so you're choosing from mainstream ranges rather than hunting for something unusual. At 25cm deep, the mattress has enough substance that a low platform frame still leaves a comfortable overall bed height for most people.
Should I buy the small double or size up to the UK double?
It comes down to who sleeps in it and how much floor you can spare. Sleeping alone in a compact room, the UK small double gives you generous space without crowding the walls. Sharing regularly, the UK double is 15cm wider and worth the room it takes, provided yours meets our suggested 2.6m x 2.8m minimum.