Sleepeezee Diamond Ortho Small Double Mattress
The Sleepeezee Diamond Ortho is a medium firm pocket sprung mattress with 1000 pocket springs housed in individual cotton pockets.
- Medium-firm support for back sleepers
- Turnable to wear more evenly
- Hypoallergenic fibre fillings
£359
Get the lowest price we've found
Save with the previous model
Some retailers still sell the earlier version of this mattress for less than the current model's best price.
Sleepeezee Diamond Ortho Mattress
More available sizes
Mattress details
Mattress
Sleepeezee Diamond Ortho Mattress
Size
Firmness
Medium Firm
Construction
Pocket Spring
Orthopaedic
Depth (cm)
24
Layers
3
Layer Details
Cover
A breathable Belgian damask fabric cover, which means air can move through the sleep surface rather than getting trapped. That helps you stay a little cooler through the night.
Comfort Fillings
Soft white fibre fillings made from 100% polyester. These give a gentle cushioned surface over the firmer springs beneath.
Support System
1000 pocket springs, each mounted in its own separate cotton pocket. Because the springs work completely independently, the mattress responds to your shape and reduces movement transferring across the bed.
Layer details from mattressnextday.co.uk product page, September 2026.
Key benefits
- Room to sprawl on your own: The UK small double is 30cm wider than the UK single, which means you can lie diagonally or throw an arm out without it dropping off the edge.
- Fits tighter bedrooms: The UK small double is 15cm narrower than the UK double, and that can decide whether a wardrobe door opens fully or bumps into the bed frame.
- Simpler to turn: This mattress is double-sided and needs flipping regularly, and a 4ft mattress is generally easier to manage alone than one of the wider sizes.
- Calmer for occasional guests: Each of the 1000 springs sits in its own pocket, so when a visiting couple shares the narrower surface, one person's movement is slightly less likely to wake the other.
- Easy to kit out: 4ft is a standard UK width, which means frames, headboards and fitted sheets for a UK small double are simple to find on the high street.
This size suits you if...
You sleep alone and want space to spread out on a firmer, supportive surface, your bedroom can't spare the floor a UK double would take, or you're furnishing a guest room where couples stay now and then rather than every night.
Consider another size if...
You share a bed with a partner every night, because two adults will feel a little cramped. We'd recommend the UK double instead, and we suggest a room of at least 2.6m x 2.8m for it.
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.
FAQ's
Will a Sleepeezee Diamond Ortho small double fit in a box room?
The UK small double measures 120 x 190cm, and we suggest a room of at least 2.4m x 2.8m. That allows space to walk round the bed and open a door. If your box room is close to that minimum, measure the door swing and any wardrobe doors before you order.
Is a UK small double Diamond Ortho big enough for one adult?
For most solo sleepers, yes. The UK small double is 30cm wider than the UK single and the same length, so you gain width for spreading out without losing any legroom. If you're tall, bear in mind that the UK small double is 10cm shorter than the UK king.
Can a couple share the Diamond Ortho in a small double for guest stays?
For a night or a weekend, yes. The pocket springs move independently, which helps when two people are close together, and the medium firm feel stops guests rolling into a dip. For a couple sleeping on it every night we'd point you to the UK double, which gives 67.5cm each.
Small double or double Sleepeezee Diamond Ortho for a loft conversion?
Sloping ceilings often leave little standing room beside the bed, and the UK small double is 15cm narrower than the UK double. That can give you enough headroom to get in and out comfortably. Both sizes are the same length, so the choice comes down to the width your roofline allows.
Is the small double Diamond Ortho easy to flip on your own?
Sleepeezee doesn't publish a weight for this size, but a 4ft mattress is generally more manageable single-handed than the wider options. Flipping matters here because the Diamond Ortho is double-sided and needs turning regularly to wear evenly. With a UK small double in a compact room, stand it on its long edge before you turn it.