Wentworth Mercer Premium 9000 Pocket Pillow Top King Size 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
£1,839
Get the lowest price we've found
Save with the previous model
Some retailers still sell the earlier version of this mattress for less than the current model's best price.
Wentworth Mercer Premium 9000 Pocket Pillow Top Mattress
More available sizes
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
- More room for each of you: Two people sharing get 75cm each, 7.5cm more each than on a UK double, which means fewer accidental nudges when one of you rolls over.
- Length for a tall partner: At 200cm long, the UK king adds 10cm over a UK double, so someone over six foot can lie straight without their feet resting on the edge.
- A little more distance at odd hours: If one of you is up long before the other, the extra width puts slightly more space between the person climbing out and the person still asleep.
- Sides you can use: A reinforced edge with butterfly border springs means the sides should hold firm, so the full width of the UK king stays usable rather than rolling you inward.
- Space without a super king footprint: We suggest at least 2.7m x 2.9m for a UK king, compared with 3m x 2.9m for the UK super king, which suits many master bedrooms better.
This size suits you if...
You share the bed every night and have run out of room on a UK double, or one of you is around six foot or taller and keeps waking up with cold feet poking past the mattress.
Consider another size if...
Your bedroom is smaller than our suggested 2.7m x 2.9m once wardrobes are in. We'd recommend the UK double instead, which needs at least 2.6m x 2.8m.
Similar Mattresses in This Price Range
Did you know? On Mattress Unboxed we have over 1,000 different mattresses to suit all types of sleepers. View all mattresses.
FAQ's
Is the Wentworth Mercer Premium 9000 Pocket Pillow Top UK king big enough for two adults?
For most couples, yes. The UK king gives 75cm each for two sharing, compared with 67.5cm each on a UK double. That 7.5cm sounds small on paper, but it is the difference between brushing against each other all night and having a clear gap. Couples who sprawl, or share with a dog, may still want more.
Should couples choose a UK king or UK super king if they disturb each other?
A UK super king gives 90cm each, so the UK king gives 15cm less each. If restless sleep is the main problem and your room allows at least 3m x 2.9m, the UK super king puts more distance between you. If your room is nearer our suggested 2.7m x 2.9m for a UK king, the UK king is the sensible fit.
What size bedroom do I need for a UK king mattress?
We suggest at least 2.7m x 2.9m for a UK king, with 3.2m x 3.2m feeling comfortable. New build master bedrooms often look generous empty and shrink once fitted wardrobes and bedside tables go in, so measure the floor you will have left, then allow room to walk round both sides.
Is a UK king long enough if you're over six foot?
It is 200cm long (6ft 6in), which is 10cm longer than a UK double. For a partner over six foot, that length is often the real upgrade rather than the width. The UK super king is the same length, so sizing up beyond the UK king gives you more width but no extra legroom.
What bedding fits a 34cm deep UK king pillow top mattress?
You need UK king sheets, and because this mattress is 34cm deep, choose fitted sheets with deep pockets so the corners stay put. A 230 x 220cm king duvet fits the UK king well. Standard-depth fitted sheets may pop off at the corners on a pillow top this deep.