Spring King Premier King Size Mattress
The Spring King Premier is a hybrid mattress with a medium feel, pairing an open coil spring system with a layer of reflex foam that cushions your body's curves.
- Even support across your whole body
- Hypoallergenic & 100% vegan
- Well suited to guest rooms
£199
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Spring King Premier Mattress
More available sizes
Mattress details
Mattress
Spring King Premier Mattress
Size
Firmness
Medium
Construction
Foam
Hybrid
Rolled
Open Coil Spring
Depth (cm)
22
Layers
3
Layer Details
Knitted Cover
A soft knitted cover that breathes well, which means heat is less likely to build up around you overnight. It should help keep your temperature fairly even until morning.
Reflex Foam
A generous layer of reflex foam that contours to your shape, cushioning your frame at every curve. You feel this as gentle give at pressure points rather than a deep sink.
Open Coil Springs
An open coil system made from high-tensile steel joined in a lattice shape, giving medium tension support across your whole body. Open coils move together as one unit, so expect a slightly bouncier, more connected feel than pocket springs.
Layer details from mattressnextday.co.uk product page, September 2026.
Key benefits
- More room for each of you: At 75cm per person, you each gain 7.5cm over the UK double, which means fewer knocked elbows and less brushing against each other when one of you turns over.
- Extra length for taller sleepers: The UK king is 10cm longer than the UK double, so a tall partner can stretch out fully instead of lying with their feet pushed against the end.
- Distance rather than isolation: Open coils are linked as one unit, so the extra width helps mainly by putting more space between you, rather than by absorbing a partner's movement.
- The biggest Premier you can buy: There's no UK super king in the Premier range, so the UK king at 5ft x 6ft 6in is the most space this mattress offers.
- Room and bedding to plan for: We suggest a bedroom of at least 2.7m x 2.9m, with 3.2m x 3.2m comfortable, and a 230 x 220cm king duvet so neither of you ends up uncovered.
This size suits you if...
You share a UK double and keep ending up in each other's space, one of you is tall enough that length matters as much as width, or you're kitting out a guest room where visiting couples need proper room on a sensible budget.
Consider another size if...
Your bedroom measures less than our suggested 2.7m x 2.9m once wardrobes and drawers are in. We'd recommend the UK double instead, which needs at least 2.6m x 2.8m.
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FAQ's
Is the Spring King Premier UK king good if my partner gets up earlier than me?
It helps, but only partly. With 75cm each, there's more distance between you when an early riser climbs out in the dark. The open coil springs are joined as one unit, though, so you'll still feel some movement when they get up. If disturbance is your main concern, the extra width eases it rather than solving it.
Is the Spring King Premier UK king long enough for a tall person?
The UK king is 200cm long, which is 10cm longer than the UK double, the UK small double and the UK single. If one of you is tall, that extra length is often the bigger upgrade, because it lets you lie straight without your feet reaching the end of the mattress.
How much more space does the Spring King Premier UK king give than a UK double?
The UK king is 15cm wider and 10cm longer than the UK double. Shared between two people, that means 75cm each on the UK king against 67.5cm each on the UK double, so you each gain 7.5cm of sleeping width.
Will a UK king Spring King Premier fit in a new build master bedroom?
New build main bedrooms can shrink quickly once fitted wardrobes go in, so measure the floor space you'll actually have left. We suggest at least 2.7m x 2.9m for the UK king. If you fall short, the UK double needs at least 2.6m x 2.8m and still suits two sharers.
Is the UK king the largest size of the Spring King Premier?
Yes. The Premier isn't made as a UK super king, so the UK king is the most room you can get from this mattress. If two of you want more than 75cm each, you'd need a different mattress. The prices shown on this page update as retailers change them.