Firmness
Medium
Type
Pocket Spring
Depth (cm)
Number of Layers
Trial Period (nights)
Warranty (years)
Price Range
£2,049 to £3,929
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.
A medium feel tends to suit the widest range of sleepers, particularly back sleepers and side sleepers who want some give at the shoulder and hip. Pocket spring construction means each spring responds to your body individually, which usually translates to better spinal alignment than a basic open-coil design. Yes, the starting price of £2,049 is high, but Harrison Spinks is a long-established British manufacturer, and one retailer lists this model with a 5 Year Guarantee. If you're weighing this against cheaper foam options, the appeal here is a traditional sprung feel with independent support, though we'd suggest confirming the full specification with the retailer before committing at this price.
Key Features & what's inside
Awaiting up to date specifications. Please check back later.
Who's it NOT for?
If your budget is under £2,049, this is out of reach in any size. Sleepers who firmly prefer a very soft or very firm surface may find this Medium variant a compromise. And if you want full construction detail before spending this much, the limited published specification may put you off.
Harrison Spinks Diamond 25000 Pocket Mattress (Medium Feel)
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How firm is the harrison spinks diamond 25000 mattress?
This entry covers the Medium feel version, a middle-of-the-road tension that suits most back and side sleepers. Be aware the retailer's page offers the Diamond 25000 in more than one firmness option, so check you're selecting Medium at checkout if that's the feel you want.
What sizes does the harrison spinks diamond 25000 come in?
Five UK sizes are listed: Single, Small Double, Double, King and Super King. Prices range from £2,049 to £3,929 across the sizes, so the jump between a smaller and larger option is worth checking before you decide.
Does the harrison spinks diamond 25000 have a guarantee?
The retailer listing this mattress states a 5 Year Guarantee. That figure comes from the retailer rather than a Harrison Spinks brand page, so it's sensible to confirm the guarantee terms directly with wherever you buy.
How much does the harrison spinks diamond 25000 cost?
Prices start from £2,049 and go up to £3,929 depending on the size you choose. That places it at the premium end of the pocket spring market, so it's a considered purchase rather than a budget buy.
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