Harrison Spinks Ruby 12500 Pocket Single Mattress (Firmer Feel)
The Harrison Spinks Ruby 12500 Pocket Mattress (Firmer Feel) is a pocket spring mattress with a firm feel.
- Designed firm from the start
- Localised support at hips & shoulders
- From a long-established British maker
£1,249
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Harrison Spinks Ruby 12500 Pocket Mattress (Firmer Feel)
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Mattress details
Mattress
Harrison Spinks Ruby 12500 Pocket Mattress (Firmer Feel)
Size
Firmness
Firm
Construction
Pocket Spring
Wool
Natural
Depth (cm)
Layers
5
Layer Details
Mini pocket springs
Small, individually cased springs sit in the comfort layer and add cushioning while cutting down motion transfer. In practice, you get a little give on top of the firm feel, and less disturbance when a partner moves.
Wool
Wool comfort filling, described as a natural insulator with temperature-regulating properties. It helps keep you from getting too warm or too cool as the night goes on.
Cotton
Natural cotton fibres create a fresh sleeping environment and wick away moisture. That should help the surface feel drier and fresher, especially if you tend to sleep warm.
Hemp
Hemp is an eco-friendly fibre that is naturally breathable and durable. It lets air move through the filling and should help the mattress keep its feel over time.
Flax
Flax fibres are durable and breathable, and are described as having anti-bacterial properties. This is a hard-wearing natural layer that adds to the airy feel of the fillings above it.
Layer details from mattressonline.co.uk and simplybedssussex.co.uk product pages, October 2026.
Key benefits
- Fits where space is tight: At 90cm wide it slots under a loft slope or alongside a desk and wardrobe, leaving usable floor space in a genuinely small room.
- Firm support scaled to one sleeper: Pocket springs respond where your body presses down, which means a single adult gets proper localised support rather than a surface sized for two and softened to match.
- A single that suits growing bodies: The firm feel gives teenagers a supportive surface they won't sink into, and the build quality is intended to last through those years rather than sag partway.
- Guest room practicality: Two UK singles offer more flexibility than one double in a guest room, and firm pocket springs suit visitors of varied weights and sleeping positions.
- Cheap, easy bedding: Standard single sheets and a 135 x 200cm duvet fit, and they're the most widely stocked and affordable bedding of any UK size.
This size suits you if...
You're a single adult who prefers a firm sleeping surface and wants a traditional pocket spring build that will last, or you're buying for a teenager whose room has to fit a bed, a desk and a wardrobe in limited floor space. It also works if you're furnishing a spare room or home office that doubles as guest space and a full-time-quality mattress matters more to you than a budget stopgap.
Consider another size if...
You're an adult who moves around at night, or the bed may eventually be shared. The UK small double is 30cm wider at the same length, and we suggest at least 2.4m x 2.8m of floor space for it.
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FAQ's
What room size do I need for the Ruby 12500 in a UK single?
We suggest allowing at least 2.1m x 2.8m of floor space, which gives you room to walk around the bed and open drawers or wardrobe doors. That guidance is ours, not the manufacturer's. In a child's or teenager's room where a desk and storage compete for space, the 90cm width is what keeps everything workable.
Is a UK single Ruby 12500 big enough for an adult?
Yes, for one adult sleeping alone. At 90 x 190cm (3ft x 6ft 3in) it's the standard UK one-person size, and the firm pocket spring feel holds you where you lie rather than letting the surface dip. If you're tall, note the UK single is 10cm shorter than the UK king.
Is the firm feel of the Ruby 12500 suitable for a child's single bed?
A firm surface generally suits growing children and teenagers well, and pocket springs support them where they actually press down. The caveat is weight: lightweight side sleepers can find a firm mattress a little unyielding at the shoulder and hip, so consider how your child sleeps before committing to this feel at this price.
How much smaller is the UK single than the UK double in this mattress?
The UK single is 45cm narrower than the UK double, and the two are the same length. That 45cm matters in a shared children's room or a guest room, where two UK singles plus a walkway can fit where one larger bed and two nightstands would struggle. For the UK double, allow at least 2.6m x 2.8m.
Where can I find the best price on the UK single Ruby 12500?
Compare the retailers listed on this page. The prices shown here are updated as retailers change them, so checking the live table beats relying on a figure you saw quoted elsewhere last week. Availability in a specific size can shift too, which is another reason to check current listings rather than cached ones.