Arthur Sleep Ortho Arthur Double Mattress
The Ortho Arthur from Arthur Sleep is a pocket spring mattress designed for firm support and restorative sleep, which means individual springs respond to your body rather than the whole surface moving as one.
- Firm support for back & front sleepers
- Cooling gel foam comfort layer
- Hypoallergenic & anti-allergy cover
£585
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Arthur Sleep Ortho Arthur Mattress
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Mattress details
Mattress
Arthur Sleep Ortho Arthur Mattress
Size
Firmness
Firm
Construction
Pocket Spring
Depth (cm)
Layers
2
Layer Details
Gel foam comfort layer
A gel foam layer sits at the top and forms the comfort layer. It adds a little cushioning over the firm springs below, and the gel is there to help control temperature.
Pocket spring core
The core is made of pocket springs, each housed in its own fabric pocket. That lets the springs move independently, so you get firm support that responds to your body rather than moving as one sheet.
Layer details from arthursleep.co.uk and mattressman.co.uk product pages, October 2026.
Key benefits
- Room to share in most bedrooms: At 135 x 190cm, the UK double fits comfortably in rooms where the UK king would leave little space to move around.
- Firm support for two: Pocket springs respond to each sleeper individually, which means one of you turning over is less likely to disturb the other.
- 67.5cm each for couples: Two people sharing get 67.5cm each, adequate for most couples, although restless sleepers may notice the limit.
- Bedside tables can stay: Allow at least 2.6m x 2.8m and most rooms will still take a table on each side, useful in older terraces and compact new builds.
- Easy to dress: Standard double sheets and a 200 x 200cm double duvet are sold everywhere, so bedding stays cheap and simple to replace.
This size suits you if...
You share the bed every night and want the traditional couples' size in a room where a UK king would feel cramped, or you sleep alone and want space to stretch out, perhaps with a dog or cat claiming a corner. It also makes sense for a guest room that hosts visiting couples, where firm support is a safe middle-ground choice.
Consider another size if...
You and your partner both want more personal space than 67.5cm each. The UK king is 15cm wider and 10cm longer, and we'd recommend it instead if your room allows at least 2.7m x 2.9m.
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FAQ's
Is the Ortho Arthur in a UK double a good size for a couple?
For most couples, yes. The UK double is the long-standing standard for two people sharing, giving 67.5cm each. The firm feel of the Ortho Arthur suits back and front sleepers particularly well. If either of you sleeps restlessly or is broad-shouldered, the UK king offers 15cm more width and 10cm more length.
What room size do I need for the Ortho Arthur double?
We suggest at least 2.6m x 2.8m for a UK double, with around 3m x 3m the comfortable norm. That leaves space to open a wardrobe and walk around the bed. If you're furnishing a second bedroom or a first flat with drawers and a wardrobe to fit in, the double usually works where a UK king would dominate.
How much bigger is the double Ortho Arthur than the single?
The UK double is 45cm wider than the UK single, and both are the same length at 190cm. That extra width is the difference between a solo bed and one two people can genuinely share. Solo sleepers often size up to the double simply for the space to spread out.
Will the double fit up narrow stairs in an older house?
Arthur Sleep doesn't publish a weight or delivery format for this mattress, so check with the retailer before ordering, especially if you have a turning staircase in an older terrace or a tight new build landing. Pocket spring mattresses generally arrive flat rather than rolled, which makes stairs the main thing to measure.
Should a solo sleeper get the double or the small double?
The UK double is 15cm wider than the UK small double, and both share the same 190cm length. Sleeping alone, either gives you generous space, though the double leaves more room for a pet at the foot of the bed and a far wider choice of bedding. The small double suits rooms under our suggested 2.6m x 2.8m; we suggest at least 2.4m x 2.8m for it.