Harrison Spinks Ruby 12500 Pocket Mattress (Soft to Medium Feel)
Mattress
Harrison Spinks Ruby 12500 Pocket Mattress (Soft to Medium Feel)
Size
Firmness
Medium Soft
Construction
Depth (cm)
29
Layers
6
Layer Details
- Damask cover. A damask cover that's soft to the touch. It's the traditional choice for a handcrafted mattress and feels pleasingly plush under a sheet.
- Wool comfort layer. Layers of British wool blended with hemp and flax fibres sit directly beneath the cover. Wool regulates temperature naturally, which means it helps you stay warm in winter and cooler in summer.
- Cotton, hemp and flax blend. A cotton, hemp and flax blend is layered throughout the mattress. These natural fibres add breathability and a slightly springy, resilient comfort that foam can't quite match.
- Cortec Quad springs. 700 Cortec Quad springs, with groups of four springs placed within a single fabric pocket. More springs per pocket means finer, more localised support as you change position.
- Posturfil springs. 1800 mini Posturfil springs designed with flexibility in mind, adapting with your body as you move through the night. In practice that means less resistance when you roll over.
- Mini springs. 10000 bouncy mini springs create pockets of airflow throughout the mattress. That built-in ventilation helps keep the natural fillings fresh over time and adds a little extra cushioning.
Layer details from mattressonline.co.uk product page, September 2026.
- Less partner disturbance: Thousands of individually pocketed springs respond to each sleeper separately, which means an early riser slipping out at 5am is far less likely to wake the person still asleep.
- Length for taller sleepers: At 200cm long, the UK king is 10cm longer than the UK Double, so anyone approaching six foot stops sleeping with their feet at the very edge.
- Room to sink in without colliding: The soft to medium feel lets shoulders and hips settle in, and 75cm each for two people sharing means you can both do that without meeting in the middle.
- Cooler sharing: Two bodies raise the temperature under a duvet, and the wool, hemp and flax fillings breathe better than foam, which helps on warm nights in a shared bed.
- Space for real life: Pillows propped for pregnancy, a dog who claims a corner every night: the width absorbs these habits in a way the UK double simply can't.
This size suits you if...
You share the bed every night and the UK double has started to feel like a compromise, you or your partner keep different hours and want movement on one side to stay on that side, or one of you is tall enough that 190cm beds leave feet hanging. It also suits couples who both sleep on their side and want that soft, cushioned surface without crowding each other.
Consider another size if...
Your bedroom is smaller than the 2.7m x 2.9m we suggest, or you mostly sleep alone. The UK double would suit you better, and we suggest at least 2.6m x 2.8m for the UK Double.
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Is a UK king big enough for a couple on the Ruby 12500?
Comfortably, for most couples. You get 75cm each for two people sharing, and because the Ruby 12500 has a soft to medium feel, each of you settles into your own side rather than rolling towards the middle. If one of you sprawls or a dog joins you nightly, the UK super king is the next step up.
Will the Ruby 12500 UK king stop me feeling my partner move?
It should reduce it noticeably. Support comes from layers of pocketed springs, including 700 Cortec Quad springs and 1800 Posturfil springs, which respond to each body individually. Combined with the width of a UK king, one partner getting up hours before the other is much less likely to disturb the person still sleeping.
Is the UK king long enough for someone over six foot?
At 200cm, the UK king gives 10cm more length than the UK Double, which is usually the difference between feet on the mattress and feet over the edge. If you're well over six foot, the UK super king is the same length, so sizing up buys width rather than extra length.
What room size do I need for this mattress in a UK king?
We suggest at least 2.7m x 2.9m, with 3.2m x 3.2m feeling genuinely comfortable once wardrobes and bedside tables are in. New build master bedrooms can be tighter than they first appear, so measure with furniture in place. If your room falls short, we suggest at least 2.6m x 2.8m for the UK Double.
Where can I buy the Ruby 12500 in a UK king?
Compare the retailers listed on this page; the prices shown here are updated as retailers change them. Handcrafted pocket spring mattresses like this one are stocked less widely than mass-market designs, so it's worth checking back if the size you want isn't showing at a price you like.