Harrison Spinks Sanctuary 9500 Medium King Size Mattress
The Harrison Spinks Sanctuary 9500 is a pocket spring mattress with a medium feel, which means the springs move independently to follow your shape rather than pushing back as one solid unit.
- Medium feel suits most sleepers
- Minimises partner disturbance
- From a long-established heritage maker
£1,653.25
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Harrison Spinks Sanctuary 9500 Medium Mattress
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Mattress details
Mattress
Harrison Spinks Sanctuary 9500 Medium Mattress
Size
Firmness
Medium
Construction
Pocket Spring
Depth (cm)
Layers
2
Layer Details
Wool and hemp blended fibres
The top layer is a blend of wool and hemp fibres, chosen for enhanced breathability. For you, that should mean a surface that lets heat and moisture escape more easily, which helps if you tend to run warm in bed.
Pocket springs
Beneath the fibres sit 9500 individually wrapped springs, under temperature-regulating wool and hemp. Because each spring works on its own, the mattress can respond to your body in separate areas, and it gives the medium feel its support.
Layer details from mattressman.co.uk product page, October 2026.
Key benefits
- Room to sleep apart, together: At 75cm each for two people sharing, you can both turn over without negotiating territory in the small hours.
- Pocket springs suit mismatched schedules: The springs compress individually, which means an early alarm on one side is less likely to travel across to the other.
- Extra length for taller sleepers: At 200cm long, the UK king adds 10cm over the UK Double, so feet stay on the mattress rather than at its edge.
- Space for restless nights: During pregnancy or recovery from an injury, when you're propping pillows and shifting position often, the wider surface makes those adjustments easier on you both.
- Fits a typical master bedroom: We suggest allowing at least 2.7m x 2.9m, which most UK master bedrooms can manage while keeping walkways clear on both sides.
This size suits you if...
You share the bed every night and a double has started to feel like a compromise, one of you is approaching 6ft and wants the 200cm length, or your sleep schedules rarely line up and you'd like enough width that comings and goings go unnoticed. A medium feel with this much space suits most sharing couples, although lightweight side sleepers may find it slightly firm.
Consider another size if...
Your bedroom is under our suggested 2.7m x 2.9m minimum, or you sleep alone. We'd recommend the UK double of this mattress instead, which needs at least 2.6m x 2.8m and saves a fair bit at this price level.
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FAQ's
Is the Sanctuary 9500 in a UK king big enough for two adults?
Yes, comfortably for most couples. It measures 150 x 200cm, which works out at 75cm each for two people sharing. That is enough width for both of you to change position freely, and the pocket spring construction keeps movement on one side from disturbing the other.
What room size do I need for the Sanctuary 9500 UK king?
We suggest allowing at least 2.7m x 2.9m. That leaves room to walk around both sides and open drawers, though a new build master can feel tighter than the floor plan suggests once fitted wardrobes go in, so measure the usable space rather than the full room.
Should I choose the UK king or UK super king in this mattress?
The UK king is 30cm narrower than the UK super king, and both are the same length. If you share with a dog who claims a corner every night, or you simply want maximum space, the UK super king is the answer, but it needs a room of at least 3m x 2.9m.
Is the UK king long enough for someone over six foot?
Usually, yes. The UK king is 200cm long, 10cm longer than the UK Double, which gives a 6ft sleeper roughly a foot of clearance. In imperial terms it measures 5ft x 6ft 6in. For very tall sleepers the length, rather than the width, is often the real reason to upgrade.
Does a UK king help if my partner and I keep different hours?
It helps a good deal. With 75cm each for two people sharing, someone slipping out for an early shift isn't climbing over or past you, and the Sanctuary 9500's pocket springs compress independently, so their movement stays largely on their side. A double offers 15cm less width, where those disturbances are harder to avoid.