Komfi Unity Comfort Ortho Small Double Mattress in a Box
The Komfi Unity Comfort Ortho is a budget boxed mattress in five UK sizes, from small single up to king.
- Firm support for back & front sleepers
- Memory foam that moulds to you
- Removable cover washes in the machine
£201.86
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Komfi Unity Comfort Ortho Mattress in a Box
More available sizes
Mattress details
Mattress
Komfi Unity Comfort Ortho Mattress in a Box
Size
Firmness
Firm
Construction
Rolled
Orthopaedic
Depth (cm)
Layers
2
Layer Details
Memory foam
A 3cm memory foam layer designed to react to your body heat and mould to your contours. It gives the firm feel a little cushioning at the surface.
Ecofoam
A 17cm base of Ecofoam, made from 100% recycled foam, designed to give firm yet comfortable support. It does most of the work in holding you up, and it's why the mattress feels firm overall.
Layer details from archerssleepcentre.co.uk and aworldoffurniture.co.uk product pages, October 2026.
Key benefits
- Real space for one: At 30cm wider than a UK single, it gives a solo adult genuine room to shift position without spilling over the edge.
- Fits rooms a double overwhelms: It's 15cm narrower than a UK double, which can be the difference between a wardrobe door opening freely and a daily squeeze past the bed frame.
- A sensible guest room size: An occasional couple can share it for a weekend stay, so it does the job in a spare room without demanding double-room floor space.
- Low-cost way to fill an awkward room: This sits at the budget end of the market, which makes it a low-risk buy for a rental, holiday let or teenager's room.
- Standard bedding and frames: 4ft is a recognised UK size, so small double fitted sheets and frames are easy to find, and a standard double duvet covers it.
This size suits you if...
You sleep alone, you've outgrown a single, and your room can't give up the floor space a standard double demands. Or you're furnishing a guest room, rental or holiday let where couples stay occasionally rather than nightly, and a cheap, no-fuss mattress at this size is exactly the brief.
Consider another size if...
You share the bed every night and your room can take the extra width. We'd recommend the UK double instead: it's 15cm wider, the same length, and needs a room of at least 2.6m x 2.8m.
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FAQ's
Is a small double big enough for a teenager?
Yes, and it's a common upgrade. The UK small double is 30cm wider than a UK single but the same length, so a teenager gets noticeably more room without the bed swallowing the floor space. At the Komfi Unity Comfort Ortho's budget price, it's a low-risk choice for a room they'll grow out of.
Can a couple sleep on the Komfi Unity Comfort Ortho small double?
For occasional nights, yes. At 120cm wide it works for guests staying a weekend, which is why it suits spare rooms and holiday lets. Couples sharing every night would find it snug, and Komfi doesn't publish detailed construction information for this model, so we'd suggest the UK double for nightly sharing.
What room size do I need for a small double mattress?
We suggest at least 2.4m x 2.8m. That allows walking space around the bed and room for doors and drawers to open. If your room is smaller, the UK single needs at least 2.1m x 2.8m and is the same length, so you lose width rather than legroom.
Should I get the small double or the double?
It usually comes down to the room. The UK small double is 15cm narrower than the UK double and the same length, so measure carefully: in a box room or studio that 15cm can decide whether the door still clears the bed. Sleeping solo, the small double is plenty. Sharing nightly, take the double if it fits.
Where can I buy this mattress in a small double?
Availability for this size changes, so the best guide is the live comparison table on this page, which is updated as retailers change their prices and stock. Compare the retailers listed here rather than assuming a price you saw elsewhere still stands.