Spring King Madrid 1000 Pocket Mattress
Mattress
Spring King Madrid 1000 Pocket Mattress
Size
Firmness
Construction
Depth (cm)
25
Layers
3
Layer Details
- Cover. A breathable Belgian damask fabric cover, which means air can move through the sleep surface rather than trapping warmth against you. It's a traditional, hard-wearing choice.
- Comfort Fillings. Soft white fibre fillings made from 100% polyester. These give a gentle cushioned feel over the springs, though they're simpler than the foam layers found on pricier mattresses.
- Support System. 1,000 individually pocketed springs, each mounted in its own separate fabric pocket so they work completely independently of one another. In practice, that means support follows your body's contours and your partner's movements are less noticeable.
Layer details from mattressnextday.co.uk product page, September 2026.
- Room to spread out alone: At 30cm wider than the UK single, it lets one adult lie diagonally or starfish, which means you stop meeting the edge every time you turn over.
- Fits a tighter double room: It is 15cm narrower than the UK double, which may decide whether the door opens or catches the frame; allow at least 2.4m x 2.8m.
- Calmer for the occasional guest: The independently pocketed springs keep a visiting partner's movements fairly contained, which helps on a narrower bed where you are lying closer together.
- No extra length to find: It is the same length as the UK single, so a teenager moving up gains width without the bed pushing further into the room.
- Simple to furnish: As a standard 4ft x 6ft 3in UK size, frames and small double fitted sheets are easy to buy almost anywhere.
This size suits you if...
You sleep alone and want more room than a single gives you, your bedroom is too snug for a UK double, or a partner or guest stays over only now and then.
Consider another size if...
You and a partner share the bed every night and want space to move. We'd recommend the UK double instead, which gives 67.5cm each; we suggest at least 2.6m x 2.8m for the UK double.
Similar Mattresses in This Price Range
Did you know? On Mattress Unboxed we have over 1,000 different mattresses to suit all types of sleepers. View all mattresses.
Is the Spring King Madrid 1000 small double big enough for one adult?
For most solo adults, yes. The UK small double is 30cm wider than the UK single, so you can sleep on your side with knees drawn up or spread out on your back without hanging over the edge. The medium firm pocket springs suit back and front sleepers well, although lighter side sleepers may find it a little firm at the hips.
Will a Madrid 1000 small double fit in a loft conversion bedroom?
Often, yes, which is a common reason people pick the UK small double. We suggest a room of at least 2.4m x 2.8m, but in a loft conversion with sloping ceilings, measure the floor where you can actually stand. The 120cm width can leave you room to get in and out on one side where a UK double would not.
Madrid 1000 small double or double for a guest room?
If guests are mostly single visitors with the occasional couple, the UK small double is a sensible fit and keeps more floor free. If couples stay regularly, the UK double is 15cm wider and gives 67.5cm each, though we suggest at least 2.6m x 2.8m for the UK double.
Is the Madrid 1000 small double good for a teenager outgrowing a single?
It suits that move well. The UK small double is the same length as the UK single, so the room loses no extra floor at the foot of the bed, only a little at the side. A growing teenager gains 30cm of width, and the pocket springs give firmer, more even support than the old open coil mattresses many single beds come with.
What bed frame do I need for a Spring King Madrid 1000 small double?
Look for a frame or divan sold as 4ft x 6ft 3in, which matches the mattress at 120 x 190cm. Standard UK small double frames are widely available. Avoid EU sizes labelled as similar, as they are not always the same measurement, and check the frame's internal dimensions rather than its outside footprint.