Sealy Exquisite Radiance Plush King Size Mattress
The Sealy Exquisite Radiance Plush Mattress combines graphite-infused ClimaLux foam with two layers of mini pocket springs, which means a soft-to-medium feel that sleeps fresher and stays bouncy underneath.
- Cooler, fresher sleep surface
- Soft feel that eases pressure
- Bouncy springs, easy to move on
£3,899
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Sealy Exquisite Radiance Plush Mattress
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Mattress details
Mattress
Sealy Exquisite Radiance Plush Mattress
Size
Firmness
Medium Soft
Construction
Foam
Pocket Spring
Depth (cm)
36
Layers
5
Layer Details
ClimaLux foam
Two 2cm layers of graphite-infused ClimaLux foam. They promote a cooler, fresher sleep surface, which helps if you tend to warm up in bed.
EcoLux ComfortCore foam
A 1cm layer that shapes around the body. It eases built-up pressure, adding to the plush feel.
Mini pocket springs
Two layers of 2000 mini pocket springs that improve airflow and give a bouncy feel. You get responsiveness rather than a slow sink.
EternityFibre
A finishing comfort layer described as highly resilient and durable. It's there to reduce settlement, so the surface should keep its shape for longer.
RestSupport coil core
A core of twice-tempered RestSupport coils that respond to body weight. This gives the support underneath the softer layers above.
Layer details from mattressonline.co.uk product page, October 2026.
Key benefits
- More elbow room each night: Each of you gets 75cm of width, which is 7.5cm more than on a UK double, so knees and elbows meet a little less often.
- Space for an early riser: If your alarms are hours apart, the extra width puts slightly more distance between you, so the one leaving first may disturb the other a little less.
- Length for a taller partner: At 200cm, or 6ft 6in, the UK king suits someone over six foot better than the 190cm UK double, which means fewer nights with feet over the edge.
- The plush top runs edge to edge: The graphite-infused foam and Medium Soft cushioning cover the full 150cm width, so both sides share the same cooler, softer surface.
- Easier to fit than a super king: The UK king is 30cm narrower than the UK super king, which helps in a new build master bedroom that shrinks once fitted wardrobes go in.
This size suits you if...
You share the bed every night and keep bumping into each other on a UK double, one of you is over six foot and wants room at the foot end, or your working hours differ and you'd like a little more distance when someone gets up early.
Consider another size if...
Your bedroom is smaller than our suggested 2.7m x 2.9m for a UK king. We'd recommend the UK double instead, and we suggest at least 2.6m x 2.8m for it.
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FAQ's
Is a Sealy Exquisite Radiance Plush UK king big enough for two people?
For most couples, yes. The UK king gives 75cm each, which is 7.5cm more per person than a UK double. If you both sprawl, or a dog joins you most nights, the UK super king gives 90cm each, so the UK king gives 15cm less each by comparison.
Is the Sealy Exquisite Radiance Plush king size long enough if you're over 6ft?
The UK king is 200cm long, or 6ft 6in, which is 10cm longer than the UK double. That extra length is often the real reason taller sleepers move up from a UK double, since the UK double measures 190cm and leaves very little room at the foot end for anyone tall.
What size bedroom do I need for a UK king Sealy Exquisite Radiance Plush?
We suggest at least 2.7m x 2.9m for a UK king, with 3.2m x 3.2m giving comfortable space to walk around. Measure after wardrobes and drawers are in place, because a new build bedroom can feel much tighter once the furniture arrives.
Should I choose the UK king or UK super king Sealy Exquisite Radiance Plush?
The UK king is 30cm narrower than the UK super king, and both are the same length. The UK super king gives 90cm each, which suits restless sleepers, but we suggest at least 3m x 2.9m for it, compared with 2.7m x 2.9m for the UK king.
Will a UK king help with partner disturbance on the Sealy Exquisite Radiance Plush?
The extra 7.5cm each over a UK double puts you slightly further apart, which helps if one of you shifts a lot or gets up early. The two layers of mini pocket springs give a bouncy feel, though, so a very light sleeper may still notice a partner moving.