Silentnight Aloe Vera Castleton 800 Pocket Eco Small Double Mattress
The Silentnight Aloe Vera Castleton 800 Pocket Eco Mattress uses 800 individual Mirapocket springs with firmer support through the centre, which means your body stays supported while a partner's movements are less likely to wake you.
- Medium feel for most sleepers
- Minimises partner disturbance
- Aloe vera-infused soft-touch cover
£479
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Silentnight Aloe Vera Castleton 800 Pocket Eco Mattress
More available sizes
Mattress details
Mattress
Silentnight Aloe Vera Castleton 800 Pocket Eco Mattress
Size
Firmness
Medium
Construction
Eco-Friendly
Pocket Spring
Depth (cm)
Layers
Layer Details
Key benefits
- Room to spread out alone: At 30cm wider than the UK single, it lets you lie diagonally or starfish, which a grown teenager or a restless adult will feel from the very first week.
- Fits a compact double room: Being 15cm narrower than the UK double leaves more floor beside the frame, which can be the difference between a wardrobe door opening fully or catching on the bed.
- Calmer for occasional sharers: The pocket springs move independently, so two guests sharing a narrower bed for a weekend are less likely to wake each other when one turns over.
- Support where a solo sleeper lies: The firmer central zone sits under your hips when you sleep in the middle of the bed, which is usually where one person settles on a UK small double.
- Straightforward bedding: 4ft is a standard UK width, so small double fitted sheets are easy to buy, and a standard double duvet will cover the mattress without hunting for odd sizes.
This size suits you if...
You sleep alone and want proper space to stretch out, in a bedroom of at least 2.4m x 2.8m that would feel cramped with a wider frame. It also suits a guest room or loft conversion where couples stay now and then but nobody shares the bed every night.
Consider another size if...
You share the bed every night, as a UK small double gets tight for two over months and years. We'd recommend the UK double instead, which gives 67.5cm each and needs at least 2.6m x 2.8m.
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FAQ's
Is a UK small double Castleton 800 big enough for two adults?
For a weekend or the occasional guest stay, most couples manage comfortably, and the independent springs help limit disturbance. For nightly sharing it is a squeeze. The UK double gives 67.5cm each, and we suggest at least 2.6m x 2.8m of room for it.
What size bedroom do I need for a UK small double mattress?
We suggest allowing at least 2.4m x 2.8m. That leaves space to walk around the bed and open drawers. In a loft conversion with a sloping ceiling, measure the floor where you can actually stand, because that usable area matters more than the total footprint.
Single or small double Castleton 800 for a teenager?
If your teenager has outgrown a single but the room can't lose much floor, the UK small double is 30cm wider and the same length, so it takes width rather than length from the room. The UK single needs at least 2.1m x 2.8m by our guidance.
Will a UK small double mattress fit a 4ft bed frame?
Yes. It measures 4ft x 6ft 3in, a standard UK size, so 4ft frames are made for it. Silentnight doesn't publish a depth for this mattress, so if your frame or headboard has a height limit, measure the frame first, then compare the retailers listed on this page.
Is the Castleton 800 small double long enough for tall sleepers?
It is 190cm long, the same as the UK single and UK double. If your feet already hang off a standard-length bed, the UK king is 10cm longer, although it needs at least 2.7m x 2.9m of room.