Harrison Spinks Oasis 5500 Firm Mattress
Mattress
Harrison Spinks Oasis 5500 Firm Mattress
Size
Firmness
Firm
Construction
Depth (cm)
Layers
Layer Details
- Fits almost any room: At 90cm wide it needs a room of only around 2.1m x 2.8m by our guidance, so it slots into box rooms and under loft slopes.
- Firm support, tuned to one sleeper: With nobody else on the mattress, the pocket springs respond to your weight alone, which means the firm surface stays even under your back and hips.
- Suits a spare room that earns two jobs: A single leaves space for a desk, so a home office can still take overnight guests, and the firm feel suits back and front sleeping visitors.
- Bedding is cheap and easy: Standard single sheets and a 135 x 200cm duvet fit, and both are the most widely stocked bedding sizes in UK shops.
- A practical first-flat buy: Student rooms and rented flats often come with a single frame and no mattress, and this size drops straight in.
This size suits you if...
You sleep alone and know you want a genuinely firm surface, you're furnishing a spare room or study that doubles as guest space, or you're buying for a teenager who sleeps on their back or front and whose bedroom is too tight for anything wider.
Consider another size if...
You share the bed, or you find 3ft leaves you short of space to stretch out. We'd recommend the UK double instead: it's 45cm wider than the UK single, the same length, and we suggest a room of at least 2.6m x 2.8m 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.
How big is the Harrison Spinks Oasis 5500 Firm in a UK single?
The UK single measures 90 x 190cm, which is 3ft x 6ft 3in. We suggest allowing at least 2.1m x 2.8m of floor space so you can get around the bed comfortably, which makes this the easiest size of the Oasis 5500 Firm to fit into a small bedroom.
Is the Oasis 5500 Firm UK single a good choice for a child?
It depends on how they sleep. The firm feel suits back and front sleepers, but a lightweight child who sleeps on their side may not sink in enough to keep their spine level, which can put pressure on the shoulder and hip. For an older, heavier teenager it's a more comfortable match.
Will the UK single Oasis 5500 Firm fit a bunk or mid sleeper frame?
The footprint matches, since bunk and mid sleeper frames take a standard 90 x 190cm single. The catch is depth: raised frames often set a maximum mattress depth for the guard rail to work, and Harrison Spinks doesn't publish a depth for this mattress, so check with the retailer before ordering.
Is a UK single big enough for an adult?
For one adult, yes. At 3ft wide it's the standard UK one-person size, and the firm pocket spring support works well for a solo back or front sleeper. If you're broad-shouldered or move around a lot at night, the UK small double is 30cm wider, the same length, and needs a room of at least 2.4m x 2.8m.
Where can I buy the Harrison Spinks Oasis 5500 Firm in a single?
Compare the retailers listed on this page. The prices shown here are updated as retailers change them, so what you see reflects current stock rather than an old snapshot. Since some product details, such as spring count and depth, aren't published for this model, it's sensible to ask the retailer directly if they matter to you.