Sleepeezee Diamond Ortho Super King 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
£499
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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
- The most personal space: At 90cm each for two sharing, you get 15cm more each than on the UK king, which means an elbow or knee is far less likely to reach you.
- Distance plus independent springs: Pocket springs limit how much movement travels across the surface, and the extra width means a fidgeting partner is simply further away from you.
- Room when the household piles in: A 6ft wide surface leaves adults some usable space when a young child or a large dog settles between you.
- Proportioned for bigger bedrooms: In a period property or a generous master bedroom, a UK king can look lost, while a UK super king fills the wall more convincingly.
- Full length for taller sleepers: At 200cm long, it gives the same extra length as the UK king, with 30cm more width on top.
This size suits you if...
You share the bed with a partner whose tossing and turning keeps waking you, or your children or dog regularly end up in the bed by morning, and your bedroom comfortably clears our suggested minimum of 3m x 2.9m.
Consider another size if...
Your bedroom is smaller than our suggested 3m x 2.9m, or you rarely share. We'd recommend the UK king instead, which needs at least 2.7m x 2.9m.
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FAQ's
Is the Sleepeezee Diamond Ortho UK super king big enough for two adults and a child?
For occasional visits, yes. Two adults get 90cm each, so a small child tucked between you takes some of that space without pushing anyone to the edge. If a child joins you most nights, this is the size that keeps everyone reasonably comfortable, which a UK king struggles to do.
Is a super king Sleepeezee Diamond Ortho hard to flip?
The Diamond Ortho is double-sided and needs turning regularly. At 180cm wide, turning the UK super king is realistically a two-person job, so plan for that. Sleepeezee doesn't publish a weight for this size, so check the brand's own guidance if lifting is a concern.
Sleepeezee Diamond Ortho super king or king for a restless partner?
If disturbance is the problem, the UK super king is the better choice. It is 30cm wider than the UK king and gives you 15cm more each, and distance helps more than any comfort layer. We suggest at least 3m x 2.9m for the UK super king and 2.7m x 2.9m for the UK king.
Can a large dog sleep on a Diamond Ortho UK super king?
A 6ft wide surface leaves room for a large dog at the foot or along one side while you both keep a reasonable share. Across the full 200cm length, there is also space for a dog to stretch out below your feet rather than curling against your legs.
Where should a UK super king go in a loft conversion bedroom?
In a loft conversion, the roof slope usually decides the wall. Place the 180cm headboard end against the full-height wall so you can sit up without hitting the ceiling. Also check the door swing and the landing turns, because a mattress this wide is less forgiving on tight stairs.