Firmness
Firm
Type
Pocket Spring
Depth (cm)
Number of Layers
Trial Period (nights)
Warranty (years)
Price Range
£1,249 to £2,399
Best Sleeping Position(s)
Certifications
Assessed from the product page published by Mattress Online, captured September 2026, and from regular price comparison across our UK retail partners.
If you prefer a firm sleeping surface, this mattress is built around that feel from the start rather than firming up a softer design. Pocket spring construction gives you localised support, which means your hips and shoulders are held where they press down rather than the whole surface dipping. Harrison Spinks is a long-established British maker, and this model sits at the pricier end, from £1,249.00, which reflects that positioning. One point of honesty: at £1,249 to £2,399 it is a serious spend, so it makes most sense if a firm pocket spring feel is genuinely what your body needs, not simply what you assume firm sleepers should buy.
Key Features & what's inside
Awaiting up to date specifications. Please check back later.
Who's it NOT for?
This is a firm mattress, so lightweight side sleepers may find it a little too unyielding at the shoulder and hip, which can cause pressure points. It is also a considerable spend at £1,249 to £2,399, so budget-focused buyers or anyone unsure they want a firm feel should look elsewhere first.
Harrison Spinks Ruby 12500 Pocket Mattress (Firmer Feel)
How firm is the Harrison Spinks Ruby 12500?
This version is listed as firm, and the product title specifies a Firmer Feel. The Ruby 12500 is sold in more than one firmness option, so check carefully at checkout that you are ordering the firmer variant if that is the feel you want.
What sizes does the Harrison Spinks Ruby 12500 come in?
It is available in five UK sizes: Single, Small Double, Double, King and Super King. Prices run from £1,249.00 for the smallest size up to £2,399, so the size you choose makes a meaningful difference to the cost.
Does the Harrison Spinks Ruby 12500 come with a guarantee?
The retailer listing for this mattress shows a 5 Year Guarantee. As this is stated on a retailer's page rather than the manufacturer's, it is sensible to confirm the guarantee terms with whichever retailer you buy from before ordering.
Is the Harrison Spinks Ruby 12500 a pocket spring mattress?
Yes. It uses pocket springs, which are individually wrapped coils that compress independently, which means the mattress supports each area of your body separately and reduces the feeling of movement transferring across the bed when a partner shifts position.
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