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.
- Room to sprawl, sleeping alone: At 30cm wider than the UK single, a side sleeper on this soft to medium surface can shift position freely without meeting the edge.
- A double feel in a box room: It's 15cm narrower than the UK double, which can be the difference between a door that clears the bed and one that doesn't.
- Pressure relief where you spread out: The soft to medium feel cushions shoulders and hips across the whole 120cm width, so lighter builds get support wherever they drift in the night.
- Breathable in a smaller room: Compact bedrooms warm up quickly, and the wool fillings and airflow from the mini springs help this sleep cooler than a foam design would.
- Easy to dress: The 4ft small double is a standard UK size, so fitted sheets and frames are straightforward to find, and a standard double duvet works fine.
This size suits you if...
You sleep alone most nights and have outgrown a single but can't spare the floor space a double demands, you're furnishing a loft conversion or studio where every centimetre of width counts, or you're setting up a guest room that hosts the occasional couple rather than two people nightly. The gently cushioned feel suits solo side sleepers of a lighter build particularly well.
Consider another size if...
You share the bed every night, because 120cm between two adults leaves little room to move on a soft to medium surface. We'd recommend the UK double instead, allowing at least 2.6m x 2.8m of floor space.
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Is the small double Ruby 12500 big enough for two people?
For occasional nights, yes. Across a 120cm width two adults will sleep close together, and on a soft to medium surface you'll feel your partner's movement more than you would on a firmer bed. As a guest room mattress for visiting couples it works well. For a couple sharing every night, the UK double or UK king would suit you better.
What room size do I need for a small double Ruby 12500?
We suggest a minimum of 2.4m x 2.8m. That gives you space to walk around the bed and open drawers or a wardrobe, which matters in the box rooms and loft conversions this size tends to end up in. Measure the sloped ceilings in a loft carefully, since headroom beside the bed decides where it can actually sit.
Should I get the Ruby 12500 in a small double or a double?
The UK small double is 15cm narrower than the UK double, and the two are the same length. Sleeping alone, you'll barely miss that width, and the smaller footprint keeps a compact room usable. Sharing regularly, the extra 15cm matters. The UK double needs a room of at least 2.6m x 2.8m, against 2.4m x 2.8m for the small double.
Is the small double Ruby 12500 good for a teenager?
It's a sensible step up from a single for a teenager who's outgrown one, since the UK small double is 30cm wider than the UK single yet the same length, so it takes surprisingly little extra floor space. The soft to medium feel suits lighter builds well. It is a premium spend for a teenager's room, though the natural fillings should age gracefully.
What are the exact dimensions of the Ruby 12500 small double?
120 x 190cm, which is 4ft x 6ft 3in. That's the standard UK small double footprint, so any 4ft frame or divan base will take it, and small double fitted sheets are easy to come by. At 190cm long it matches the UK single and UK double; the UK king and UK super king run 10cm longer.