Relyon Orthofirm Deluxe 800 Pocket Mattress
Mattress
Relyon Orthofirm Deluxe 800 Pocket Mattress
Size
Firmness
Firm
Construction
Depth (cm)
23
Layers
4
Layer Details
- Damask cover. A finely woven, durable fabric that feels soft to the touch and doesn't retain heat. That means a cooler surface than many synthetic covers, and one built to last.
- Dual density white fibres. This layer offers a comforting embrace while reinforcing the firm feel, which means a little softness at the surface without undermining the support beneath.
- Soft white fibres. Densely packed fibres that support the spring unit and increase the firm feel. In practice, this is what keeps the mattress feeling stable and consistent edge to edge.
- Pocket springs. 800 pocket springs, each in its own fabric pocket, so they move independently. You'll feel more responsive, localised support and less disturbance from a partner's movement.
Layer details from mattressonline.co.uk product page, September 2026.
- Real width for one sleeper: At 120cm across, the UK small double is 30cm wider than the UK single, which means a solo adult can stretch out properly on a genuinely firm surface.
- Fits where a bigger bed won't: It's 15cm narrower than a UK double, so it suits box rooms, studio flats and loft conversions where every centimetre of floor space matters.
- Firm support in a smaller footprint: The 800 pocket springs give even, firm support across the full 120cm width, so you can use the whole surface rather than just the middle.
- Practical for occasional sharing: Two can share for the odd night, which makes this size a sensible pick for a guest room that hosts couples occasionally rather than nightly.
- Standard 4ft bedding and frames: The small double is a standard UK size, so small double fitted sheets and 4ft frames are easy to find, and its 22.5cm depth suits most of them.
This size suits you if...
You're a solo adult, or a teenager who has outgrown a single, and you want more width without giving up the floor space a full double demands. It also fits if your bedroom, loft conversion or rental second room simply won't take anything wider than 120cm, or you're kitting out a guest room where couples stay occasionally rather than every night.
Consider another size if...
You share the bed every night and want proper space each, since this model has no UK double in its range. We'd recommend the UK king instead, which gives 75cm each for two sharing; allow at least 2.7m x 2.9m of room.
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How big is the Relyon Orthofirm Deluxe in a UK small double?
It measures 120 x 190cm, which is 4ft x 6ft 3in. That's 30cm wider than the UK single and 15cm narrower than a standard UK double, at the same 190cm length as both. We suggest a room of at least 2.4m x 2.8m so there's space to walk around it.
Is the small double Relyon Orthofirm good for couples?
For occasional nights, yes. The pocket springs move independently, so you'll feel less of a partner shifting. For nightly sharing, though, 120cm is tight for two adults, and there's no UK double in this range, so the UK king, which gives 75cm each, is the better step up.
Will a small double fit in a box room?
Usually, and that's the main reason to choose it. At 120cm wide it saves 15cm over a UK double, which is often the difference between a door clearing the bed and not. Measure your room against our suggested minimum of 2.4m x 2.8m before you order.
Does the firm feel matter more at this size?
Slightly, yes. A solo sleeper on a small double tends to use the whole surface, and the 800 pocket springs support the mattress evenly edge to edge, so you get the same firm feel wherever you lie rather than a softer perimeter.
What bedding fits the small double Relyon Orthofirm?
You'll need small double, or 4ft, fitted sheets, and the 22.5cm depth means standard-depth ones fit without straining. Most people pair the size with a standard double duvet, which drapes generously over a 120cm mattress. Small double frames and bases are widely stocked in the UK.