Last seen for £299 at Silentnight on 30th September 2026
Silentnight Comfort Miracoil Essentials Small Double Mattress
The Silentnight Comfort Miracoil Essentials is a firm mattress at the affordable end of Silentnight's range, available in five UK sizes from Single to Super King.
- Firm support with even weight spread
- Memory layer softens pressure points
- 60-night trial & 5-year guarantee
Save with the previous model
Some retailers still sell the earlier version of this mattress for less than the current model's best price.
More available sizes
Last seen for £239 at Silentnight on 30th September 2026
Last seen for £369 at Silentnight on 30th September 2026
Last seen for £459 at Silentnight on 30th September 2026
Last seen for £299 at Silentnight on 30th September 2026
Last seen for £309 at Silentnight on 30th September 2026
Mattress details
Mattress
Silentnight Comfort Miracoil Essentials Mattress
Size
Firmness
Firm
Construction
Latex
Depth (cm)
21
Layers
5
Layer Details
Cover
Luxury soft micro quilt cover
Top Layer
Miracoil zoned spring system
Key benefits
- Room to spread out alone: At 120cm wide it's 30cm wider than the UK single, which means a solo sleeper can shift position freely without an arm off the edge.
- Fits rooms a double crowds: It's 15cm narrower than the UK double, so it can leave walking space in a box room or loft conversion where a 4ft 6in bed would not.
- Firm support in a smaller footprint: The zoned spring system distributes weight evenly across the 120cm width, which means the firm feel holds up whether you sleep centred or drift to one side.
- A shallower build suits smaller spaces: At 21cm deep it sits lower than many mattresses, which keeps the bed's profile modest in rooms with sloped ceilings or limited headroom.
- Easy bedding to find: The 4ft small double is a standard UK size, so fitted sheets and frames are widely stocked, and the slimmer depth suits shallower fitted sheets.
This size suits you if...
You sleep alone most nights and want more width than a single without giving your room over to a full double, your bedroom is around our suggested minimum of 2.4m x 2.8m, or you're furnishing a guest room or let where couples stay occasionally rather than every night and a firm, affordable mattress makes sense.
Consider another size if...
You share the bed every night, because 120cm split between two adults on a firm surface feels tight quickly. 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
Will the Silentnight Comfort Miracoil Essentials small double fit in a box room?
Often, yes. The mattress is 120 x 190cm, and we suggest a room of at least 2.4m x 2.8m so you can still open the door and walk around one side. Measure with the door swing in mind: in a true box room or studio, that extra 15cm saved against a UK double is usually what decides it.
Is the small double Silentnight Comfort Miracoil Essentials big enough for a couple?
For occasional nights, yes; for every night, we'd hesitate. Two adults on 120cm have noticeably less width than a UK double, and the firm feel means you won't sink towards each other, which helps. As a guest room mattress for visiting couples it works well. As a permanent shared bed, size up.
Should I choose this mattress in a small double or a double?
The UK small double is 15cm narrower than the UK double and the same length, so the question is really about your room and who's sleeping there. Solo sleepers in compact rooms are well served by the small double. If you share nightly and your room measures at least 2.6m x 2.8m, take the UK double.
Is a small double a good step up from a single for a teenager?
It's a sensible one. The UK small double is 30cm wider than the UK single and exactly the same length, so a growing teenager gains real width without the bed eating more floor space lengthways. The firm feel of this mattress also gives solid support, though lightweight side sleepers may find it slightly hard.
Where can I buy the Silentnight Comfort Miracoil Essentials in a UK small double?
Compare the retailers listed on this page. The prices shown here are updated as retailers change them, so it's worth checking back before you commit, as stock and pricing on this size can move around. Buying through a listed retailer means you're getting the same mattress at whatever today's best price happens to be.