Arthur Sleep Royal Arthur Mattress
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Mattress
Arthur Sleep Royal Arthur Mattress
Size
Firmness
Firm
Construction
Pocket Spring
Depth (cm)
Layers
2
Layer Details
Gel foam comfort layer
A layer of gel foam sits at the top as the comfort and filling layer. Gel foam is associated with cooling comfort, which suits you if you tend to feel the heat at night.
3000 pocket springs
The support system is made up of 3,000 pocket springs, each working on its own. That lets the mattress respond to your body shape, and it gives the firm, supportive feel the Royal Arthur is built around.
Layer details from mattressman.co.uk and arthursleep.co.uk product pages, October 2026.
- Made for sharing in ordinary rooms: At 4ft 6in x 6ft 3in, it takes a typical UK bedroom in its stride, leaving space for a wardrobe and drawers.
- Springs that keep the peace: With 3,000 pocket springs across the width, each side responds separately, which means less disturbance when your partner turns over.
- 67.5cm each for two people sharing: That's the standard shared allowance for a UK double: cosy rather than sprawling, and enough for most couples who sleep settled.
- Firm support on both sides: The firm tension holds you level whichever half you sleep on, suiting back and front sleepers who want a solid surface.
- Easy to dress and easy to buy for: Double sheets and 200 x 200cm duvets are stocked everywhere, so replacing bedding never becomes a hunt.
- Room for tables both sides: Allow at least 2.6m x 2.8m and most rooms will still take a bedside table on each side of the bed.
This size suits you if...
You're a couple in a typical UK bedroom and want a proper shared bed without giving the room over to it, you're furnishing a guest room that visiting couples will use, or you sleep alone and want space to stretch out, perhaps with a dog or cat claiming a corner by morning.
Consider another size if...
You and your partner both like room to sprawl, or one of you is a restless sleeper. The UK king is 15cm wider and 10cm longer; allow at least 2.7m x 2.9m and we'd recommend it instead.
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Is the UK double Royal Arthur big enough for a couple?
For most couples, yes. You each get 67.5cm of width, the standard shared allowance for a UK double, and the 3,000 pocket springs limit how much you feel each other move. If either of you is broad shouldered or a restless sleeper, the UK king's extra 15cm of width is a sensible upgrade.
Will the Royal Arthur double fit my room with bedside tables on both sides?
Usually. We suggest allowing at least 2.6m x 2.8m for a UK double, and around 3m x 3m is the comfortable norm. The 135cm width leaves more clearance either side than a UK king would, which is often what keeps both tables and the wardrobe doors workable.
Should I get the Royal Arthur in a double or a king?
Choose the UK double if your room is on the smaller side or you want space around the bed; choose the UK king if you share every night and want more room each. The UK king is 15cm wider and 10cm longer, and we suggest a room of at least 2.7m x 2.9m for it.
How much does each person feel the other move on this mattress?
Less than on many doubles. Pocket springs move independently, and with 3,000 of them in this mattress the surface responds to each sleeper separately rather than tilting as one unit. Across a 135cm width that matters, because you're sleeping fairly close together and any motion transfer is more noticeable.
What bedding do I need for the Royal Arthur in a UK double?
Standard UK double bedding: sheets sized for 135 x 190cm and a 200 x 200cm double duvet. It's the most widely stocked bedding size in Britain, available at every price point, which makes the UK double a slightly cheaper size to keep dressed over the years than a UK king or UK super king.