Harrison Spinks Jade 10000 Pocket Mattress (Medium Feel)
Mattress
Harrison Spinks Jade 10000 Pocket Mattress (Medium Feel)
Size
Firmness
Medium
Construction
Depth (cm)
29
Layers
4
Layer Details
- Comfort fillings. A blend of wool, cotton, hemp and flax fibre layers sits at the top. The wool cushions around you for a plush feel, and its natural insulating and breathable properties help regulate temperature through the night.
- Mini Pocket Springs. 8,000 mini pocket springs mould around your unique body shape for enhanced comfort. Their small size also creates pockets of airflow, which means less heat build up than a solid comfort layer.
- Posturfil Springs. 1,300 Posturfil springs with a flexible design sit beneath. Their mini size helps them conform more closely to your shape, offering more points of contact and, in practice, more even pressure relief.
- Cortec Quad Springs. The base layer uses 7,000 award-winning Cortec Quad springs, grouped in fours within fabric pockets and made without glue for flexibility. They respond to your weight and movements, giving your back extra support.
Layer details from mattressonline.co.uk product page, September 2026.
- Real space for one: At 30cm wider than the UK single, it gives a solo sleeper genuine sprawling room without demanding a double-sized bedroom.
- Fits compact rooms: 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.
- Natural fillings in a smaller footprint: Wool, cotton, hemp and flax breathe well, so a warm sleeper in a snug, less ventilated room still gets decent temperature regulation.
- Gentle support at the edges too: The pocket spring layers respond independently across the surface, useful on a narrower mattress where you use every centimetre.
- Standard 4ft sizing: The small double is a standard UK size, so frames and fitted sheets are easy to find rather than a special order.
This size suits you if...
You sleep alone and have outgrown a UK single but your room can't take a full double, you're furnishing a guest room where couples stay occasionally rather than nightly, or you're downsizing and the bed has to fit the new room. A medium feel suits most solo side and back sleepers, although heavier sleepers may find it a little soft.
Consider another size if...
You share the bed every night, as 120cm is a squeeze for two adults long term. We'd recommend the UK double instead; allow at least 2.6m x 2.8m of floor space for it.
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.
Is the Jade 10000 small double big enough for one adult?
Comfortably, yes. The UK small double is 30cm wider than the UK single at the same 190cm length, so a solo adult can spread out, change position freely and still stay on the springs rather than the edge. Taller sleepers should check the 190cm length against their height before buying.
What room size do I need for a small double mattress?
We suggest allowing at least 2.4m x 2.8m for a UK small double. That leaves enough clearance to walk round the bed and open drawers or a wardrobe. In a box room or loft conversion, measure where the sloped ceiling or door swing sits before committing.
Can a couple sleep on the Jade 10000 in a UK small double?
For occasional nights, yes, which makes it a sensible guest room choice. The independent pocket springs limit how much you feel a partner moving. For every night, 120cm gives each person less width than a UK single each, so most couples find it too snug long term.
Should I get the small double or the double in the Jade 10000?
It usually comes down to the room. The UK small double is 15cm narrower than the UK double and the same length, and we suggest at least 2.6m x 2.8m for the UK double against 2.4m x 2.8m for the small double. Sharing nightly, take the UK double if it fits.
Is a small double a standard UK size for frames and bedding?
Yes. The 4ft small double is a recognised standard UK size at 120 x 190cm, so frames, fitted sheets and protectors are widely stocked. Use small double fitted sheets with a standard double duvet, which drapes generously over the narrower mattress. Compare the retailers listed on this page for current pricing.