Sealy PosturePedic Sandridge Combination King Size Mattress
The Sealy PosturePedic Sandridge Combination Mattress combines a cooling Black Diamond foam top layer with twice-tempered coils, which means a firm, supportive feel that starts cool and stays steady underneath you.
- Instant cooling feel on top
- Cushions hips & lower back
- Handmade in the UK
£1,999
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Sealy PosturePedic Sandridge Combination Mattress
More available sizes
Mattress details
Mattress
Sealy PosturePedic Sandridge Combination Mattress
Size
Firmness
Firm
Construction
Foam
Depth (cm)
30
Layers
3
Layer Details
INFUSE Black Diamond foam
The top layer, designed to give an instant cooling feel. That means the surface feels fresh when you first lie down.
INFUSE Eco ComfortCore foam
A sustainable plant-based foam that cushions the hips and lower back. It adds some give to an otherwise firm mattress.
AlignSupport Coil
Sealy's patented coils, twice tempered for extra strength and durability. They form the supportive base, so the mattress should keep its firm feel over time.
Layer details from crushedvelvetbedstore.co.uk product page, November 2026.
Key benefits
- 75cm each for two: Each of you gets 75cm of width, which means 7.5cm more than in a UK double, enough to turn over without ending up on your partner's side.
- Room for taller sleepers: At 200cm, or 6ft 6in, the UK king is 10cm longer than a UK double, so a partner over six foot is less likely to have feet over the end.
- Space for different schedules: If one of you gets up hours before the other, the extra width puts a little more distance between you when the early riser climbs out.
- Firm support for two: Sealy rates the Sandridge firm, which gives two back sleepers steady support, although a lighter side sleeper may feel some pressure at the shoulders.
- Sides you can sit on: UniCased edge support should make the sides more dependable for sitting on, which helps when each of you gets in and out from your own side.
- Fits a modest main bedroom: It needs less floor space than a UK super king; we suggest at least 2.7m x 2.9m, with 3.2m x 3.2m feeling comfortable.
This size suits you if...
You share the bed every night and feel cramped in a UK double, one of you is over six foot and keeps running out of length, or you keep different hours and want a little more distance when one of you gets up early.
Consider another size if...
You regularly share the bed with a dog or a child as well as a partner, and 75cm each would still feel tight. We'd recommend the UK super king instead, which gives 90cm each and needs at least 3m x 2.9m.
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FAQ's
Is the Sealy Sandridge UK king big enough for two adults?
For most couples, yes. The UK king gives 75cm each for two people sharing, which is 7.5cm more each than a UK double. That extra width is what most people notice first: you can shift position without nudging your partner. If you also share with a pet or a child, the UK super king gives 90cm each.
Is a king size Sealy Sandridge long enough if you're over 6ft?
It's the length upgrade most tall sleepers are after. The UK king is 200cm long, or 6ft 6in, which is 10cm longer than a UK double. If one of you is over six foot, that extra length can matter more than the extra width. The UK super king is the same length, so sizing up beyond the UK king adds width only.
What size bedroom do I need for a Sealy Sandridge UK king?
We suggest at least 2.7m x 2.9m, with 3.2m x 3.2m feeling comfortable once you add bedside tables and wardrobes. New build main bedrooms can feel smaller than their floor plans, so measure from the fitted furniture rather than the walls, then compare the retailers listed on this page.
Should I get the Sealy Sandridge in a king or super king?
The UK king is 30cm narrower than the UK super king, so you each get 15cm less, at 75cm against 90cm. Both are 200cm long. Choose the UK super king if you want the most personal space and have at least 3m x 2.9m. The UK king suits couples who want more room than a UK double in a smaller bedroom.
What bedding fits a Sealy Sandridge king size mattress?
Standard UK king sheets fit the 150 x 200cm surface, and a 230 x 220cm king duvet gives two people enough to share without tugging it across. The mattress is 30cm deep, so check that a fitted sheet's pocket depth covers that before you buy.