Millbrook Wool Sublime Pocket 4000 King Size Mattress
Millbrook

Millbrook Wool Sublime Pocket 4000 King Size Mattress

The Millbrook Wool Sublime Pocket 4000 Mattress combines natural wool, silk and cotton fillings over pocket springs with a hand-tufted finish, which means a medium-to-firm feel that's built to be flipped and rotated.

  • Natural wool, silk & cotton fillings
  • Flip & rotate to even out wear
  • Hand-tufted for lasting shape

£693.46

Size: King Size. Available at Archers Sleepcentre

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Where can I buy the Millbrook Wool Sublime Pocket 4000 King Size Mattress?

Below are the best prices for the Millbrook Wool Sublime Pocket 4000 Mattress in a King Size. Available from (9) trusted retailers.

Millbrook Wool Sublime Pocket 4000 Mattress

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Prices last checked:
6th November 2026

Mattress dimensions for the Millbrook Wool Sublime Pocket 4000 King Size Mattress

Length: 200cm

Width: 150cm

(5ft x 6ft 6in)

Minimum room size: 2.7m x 2.9m

Mattress details

Mattress Details for the Millbrook Wool Sublime Pocket 4000 King Size Mattress

Mattress

Millbrook Wool Sublime Pocket 4000 Mattress

Size

UK King (5ft x 6ft 6in)

Firmness

Medium Firm

Construction

  • Natural

  • Pocket Spring

  • Wool

Depth (cm)

31

Layers

Layer Details

Key benefits

Key Benefits of the Millbrook Wool Sublime Pocket 4000 King Size Mattress

  • More room each: Each of you gets 75cm when sharing, which means 7.5cm more apiece than the UK double and a little more distance from a partner who fidgets.
  • Length for taller sleepers: At 200cm long, the UK king is 10cm longer than a UK double, so anyone approaching 6ft is less likely to find their feet at the edge.
  • Easier on staggered schedules: If one of you is up hours before the other, the extra width gives the early riser a better chance of slipping out without disturbing the one still asleep.
  • Steady support across the full width: The medium-firm pocket spring build gives the same steady feel on both sides of a UK king, which suits couples who mostly sleep on their backs.
  • Room demands short of a super king: We suggest at least 2.7m x 2.9m for a UK king, while the UK super king needs at least 3m x 2.9m.
  • Standard bedding fits: King sheets and a 230 x 220cm king duvet fit, so you can buy bedding without hunting for unusual sizes.

Who should buy the Millbrook Wool Sublime Pocket 4000 King Size Mattress?

This size suits you if...

You share the bed every night and keep brushing against each other on a UK double, or one of you rises much earlier and you want a little more space between you. It also suits you if one partner is close to 6ft and the UK double's length leaves their feet hanging over the edge.

Consider another size if...

Your bedroom measures less 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.

FAQ's

Frequently Asked Questions About the UK King

What are the dimensions of the Millbrook Wool Sublime Pocket 4000 king size?

The UK king measures 150 x 200cm, or 5ft x 6ft 6in. It is 31cm deep, a substantial mattress, so fitted sheets need deep pockets to tuck in properly.

How much space does each person get on a UK king mattress?

Two people sharing get 75cm each. That is 7.5cm more each than on a UK double, and 15cm less each than on a UK super king, which gives 90cm per person.

What size bedroom do you need for a UK king mattress?

We suggest at least 2.7m x 2.9m, with 3.2m x 3.2m giving comfortable room to walk round. New build master bedrooms can feel smaller than their floor plan once built-in wardrobes go in, so measure the space that is actually left.

Is a king size mattress long enough for someone over 6ft?

At 200cm, the UK king is 10cm longer than a UK double, which helps anyone approaching 6ft. If length is your main reason for upgrading rather than width, the UK super king is the same length, so the UK king gives you that extra length without the bigger room.

Is the Millbrook Wool Sublime Pocket 4000 king size hard to flip?

It is double-sided, so you can flip and rotate it, but a 31cm deep mattress at 150 x 200cm is bulky to turn. Millbrook doesn't publish a weight for this mattress, so plan on two people doing it together.