Wentworth Mercer Premium 9000 Pocket Pillow Top Super King Mattress
The Wentworth Mercer Premium 9000 Pocket Pillow Top Mattress layers a plush pillow top with mini pocket springs over a pocket spring core, which means a sink-in surface with medium support beneath.
- Plush sink-in pillow top feel
- Supportive reinforced edges
- Natural wool, cotton & silk filling
£2,269
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Wentworth Mercer Premium 9000 Pocket Pillow Top Mattress
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Mattress details
Mattress
Wentworth Mercer Premium 9000 Pocket Pillow Top Mattress
Size
Firmness
Medium
Construction
Pocket Spring
Wool
Depth (cm)
34
Layers
2
Layer Details
Pillow top comfort layer
A plush pillow top packed with natural fibres and mini springs, giving a sink-in feel. It means a soft, cushioned surface that eases you into the mattress.
Pocket spring core
1,000 traditional pocket springs form the heart of the mattress, with 8,000 mini pocket springs blended into the comfort filling layers. That gives the medium feel and a supportive base under the softer top.
Layer details from wentworthandmercer.com product page, October 2026.
Key benefits
- A full 90cm each: Each sleeper gets 90cm, which is 15cm more than on the UK king, so a partner who turns often is less likely to disturb you.
- Room for night-time visitors: At 6ft x 6ft 6in, a small child or a large dog can join you without one adult ending up clinging to the side.
- Usable edges on a wide bed: Butterfly border springs reinforce the sides, which means the outer strip of this 180cm width should stay supportive when someone is pushed out towards it.
- Proportioned for a large room: In a period property or a spacious master bedroom, the UK super king fills the floor in proportion, where a UK king can look a little lost.
- Same length as the UK king: At 200cm long, it adds width without extra length, so moving up from a UK king will not shorten your walkway at the foot of the bed.
This size suits you if...
You share with a partner whose tossing and turning wakes you, and you want distance between you as well as a soft surface. It also suits you if young children or a large dog regularly end up in your bed, and your bedroom comfortably clears our suggested minimum of 3m x 2.9m.
Consider another size if...
Your bedroom is under 3m wide, or you sleep alone most nights. We'd recommend the UK king instead, which needs at least 2.7m x 2.9m.
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FAQ's
What size room do I need for a UK super king Wentworth Mercer Premium 9000?
We suggest at least 3m x 2.9m, and around 3.5m x 3.2m feels more comfortable once you add bedside tables. In a loft conversion, measure the full-height floor area rather than the total, because a sloping ceiling often decides which wall the headboard can go against.
How much space does each person get on a UK super king?
Two people sharing get 90cm each. That is 15cm more per person than on the UK king and 22.5cm more than on the UK double. If your partner moves a lot in the night, that extra distance often matters more than how plush the top layer feels.
Is a UK super king big enough for two adults and a child?
For occasional visits, usually yes. At 180cm wide, a small child can settle between two adults without either of you being pushed to the edge. If a child sleeps in with you every night as they grow, the space will start to feel tighter, although the reinforced edges keep the outer sides supportive.
Will a 34cm deep super king mattress fit through my door and up my stairs?
Measure before ordering. This mattress is 180cm wide, 200cm long and 34cm deep, so check the narrowest turn on your landing, the bedroom door swing and any low ceiling on the stairs. Wentworth Mercer doesn't publish whether it can be folded or rolled, so assume it will arrive flat.
What bedding fits the Wentworth Mercer Premium 9000 super king?
You need super king sheets and a 260 x 220cm duvet. With a 34cm depth, check that the fitted sheet's pocket is deep enough before buying, because standard depths can slip off the corners of a pillow top. Super king bedding also costs more than UK king sets, so budget for it.