Silentnight Miracoil Ortho Mattress
Mattress
Silentnight Miracoil Ortho Mattress
Size
Firmness
Construction
Depth (cm)
24
Layers
2
Layer Details
- Eco Comfort Fibres. A comfort layer made with Silentnight's Eco Comfort fibres, partially made from recycled plastic including bottles. It is breathable, helps regulate temperature and reduces moisture build-up, which means you should feel less clammy overnight.
- Miracoil® springs. Silentnight's Miracoil® support system gives zoned support where your body needs it most, so heavier areas like your hips get firmer resistance. It also supports right to the edge of the bed and is designed to limit partner disturbance when one of you moves.
Layer details from silentnight.co.uk product page, September 2026.
- Real space for one: At 30cm wider than the UK single, it gives a solo sleeper genuine stretching room without demanding a bigger bedroom.
- Fits rooms a double can't: It's 15cm narrower than the UK double, which can be the difference between a door that clears the bed frame and one that doesn't.
- Edge support matters more at 4ft: The Miracoil® springs support right to the edge, so on a narrower mattress you can use the full 120cm width without feeling you'll roll off.
- Firm support for a growing sleeper: The firm, zoned feel suits a teenager who has outgrown a single but whose room can't spare the floor space a double takes.
- Copes with occasional sharing: The zoned springs are designed to limit partner disturbance, useful when a guest room small double takes two people for the odd weekend.
This size suits you if...
You sleep alone and want more width than a UK single without giving up floor space, your bedroom, box room or loft conversion can't take a standard double, or you're furnishing a guest room or holiday let where couples stay occasionally rather than nightly. We suggest a room of at least 2.4m x 2.8m for this size.
Consider another size if...
You share the bed every night, because 120cm is tight for two adults long term. We'd recommend the UK double instead, which is 15cm wider; allow at least 2.6m x 2.8m of room for it.
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Is the small double Silentnight Miracoil Ortho big enough for a couple?
For occasional nights, yes. Two adults can share the 120cm width, and the Miracoil® springs support right to the edge, so neither of you loses usable space. For every night, it's a squeeze. If you share regularly, the UK double gives you 15cm more width and is the same length.
What room size do I need for a small double mattress?
We suggest allowing at least 2.4m x 2.8m for the UK small double. That leaves enough space to walk round the bed and open drawers or a wardrobe. It's our guidance rather than Silentnight's, so measure your room, including where the door swings, before you commit.
Is the Silentnight Miracoil Ortho small double the same length as the double?
Yes. The UK small double and the UK double are both 190cm long; only the width changes, with the UK small double 15cm narrower at 120cm. So if you're choosing between them, the deciding factor is room width, and how much of it you can spare.
Should I size up to the double or king instead?
Only if your room allows it. The UK double is 15cm wider and needs at least 2.6m x 2.8m. The UK king is 30cm wider and 10cm longer, needing at least 2.7m x 2.9m. If your room is under those, the UK small double is the sensible choice, not a compromise.
Where can I buy the Silentnight Miracoil Ortho in a small double?
Stockists change, so rather than list names here, we'd point you to the comparison table on this page. The prices shown are updated as retailers change them, so it's the quickest way to see who currently sells the UK small double and at what price.