Arthur Sleep Spare Arthur Mattress
Mattress
Arthur Sleep Spare Arthur Mattress
Size
Firmness
Medium Firm
Construction
Depth (cm)
Layers
Layer Details
- Fits the smallest rooms: At 90cm wide it slots under a loft conversion slope or into a box room while leaving space for a desk and wardrobe.
- Sensible for growing sleepers: The pocket springs respond to each sleeper individually, which means a light child and a heavier teenager both get support matched to their weight.
- Medium firm middle ground: A medium firm tension is a safe pick for a guest bed, where you can't predict how your visitors like to sleep.
- Cheap, easy bedding: Standard single sheets and a 135 x 200cm single duvet fit, and both are the most widely stocked bedding of any UK size.
- Two singles beat one double for siblings: In a shared children's room, a pair of UK singles with a walkway between them uses space more flexibly than one wide bed.
This size suits you if...
You're buying for a child or teenager moving to a full-size bed, you're furnishing a spare room or study that doubles as guest space, or you sleep alone in a compact room and want the springs and floor space of a proper single without a big spend.
Consider another size if...
You're an adult who spreads out in your sleep, or you occasionally share the bed. The UK small double is 30cm wider at the same length, and we suggest at least 2.4m x 2.8m of room for it.
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What size is the Spare Arthur UK single mattress?
It measures 90 x 190cm, or 3ft x 6ft 3in. That's the standard UK single, so it fits any standard single bed frame, divan or slatted base without gaps or overhang.
Will the Spare Arthur single fit a bunk or mid sleeper frame?
The width and length match standard bunk and mid sleeper frames. Arthur Sleep doesn't publish a depth for this mattress, though, and raised frames usually have a maximum mattress height for guard rail safety, so check your frame's limit and confirm the depth with the retailer before buying.
Is a UK single Spare Arthur big enough for an adult?
For one average-sized adult, yes: it's the standard solo size and works well in a first flat or student room where the frame is provided. Broader or taller sleepers may feel the 90cm width, in which case sizing up to the UK small double gives 30cm more room at the same length.
How much floor space does the Spare Arthur single need?
We suggest allowing at least 2.1m x 2.8m. That leaves room to walk around the bed and open drawers or a wardrobe, which matters in a child's room where the bed competes with toy storage and a desk.
Is the single Spare Arthur a good guest bed?
It's a reasonable choice. The medium firm pocket spring feel sits in the middle ground most guests tolerate well, and a single fits a spare room that also serves as an office. Compare the retailers listed on this page for the current price in this size.