Spring King Memory Ortho Small Double Mattress
The Spring King Memory Ortho is a hybrid of sorts: open coil springs topped with memory foam, finished with a breathable knitted cover.
- Firm support that holds you level
- Eases pressure at hips & shoulders
- Breathable cover lets heat escape
£189
Get the lowest price we've found
Save with the previous model
Some retailers still sell the earlier version of this mattress for less than the current model's best price.
Spring King Memory Ortho Mattress
More available sizes
Mattress details
Mattress
Spring King Memory Ortho Mattress
Size
Firmness
Firm
Construction
Foam
Hybrid
Memory Foam
Open Coil Spring
Depth (cm)
26
Layers
3
Layer Details
Cover
A soft knitted cover that is breathable, which means heat can escape rather than build up under you. It helps keep you at a more even temperature through the night.
Memory Foam
This layer moulds to your body, which means pressure points such as hips and shoulders get some relief while you still feel supported. It is where the orthopaedic comfort of the mattress comes from.
Open Coil Springs
Interlaced coils of high-tensile steel joined together in a lattice. Because the coils are connected, the surface responds as one unit, giving broad, even body support with a traditionally firm feel.
Layer details from mattressnextday.co.uk product page, September 2026.
Key benefits
- Room to sprawl on your own: At 30cm wider than the UK single, you can sleep diagonally or on your back with arms out, and the firm open coils keep you level wherever you settle.
- Fits rooms a double would crowd: Being 15cm narrower than the UK double can decide whether a wardrobe door or bedroom door still opens freely, which matters in a box room or studio flat.
- A sensible step up for teenagers: If your teenager has outgrown a single but the room cannot lose more floor, the UK small double adds width without swallowing the space they use for a desk.
- Workable in a loft conversion: Where a sloping ceiling leaves little standing room beside the bed, the narrower frame gives you more usable floor on the side you climb in from.
- Firm support for one: The memory foam eases your hips and shoulders while the connected coils hold you steady, and sleeping alone means the coils' tendency to pass on movement rarely matters.
This size suits you if...
You sleep alone and a UK single now feels cramped, or your bedroom cannot give up the floor a UK double would take, and any sharing is limited to the odd weekend with guests.
Consider another size if...
You share the bed every night, because the linked coils pass movement across an already narrow surface. We'd recommend the UK double instead, which gives 67.5cm each; allow at least 2.6m x 2.8m.
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.
FAQ's
What room size do I need for a Spring King Memory Ortho UK small double?
We suggest allowing at least 2.4m x 2.8m for a UK small double. That leaves space to walk around the bed and open drawers. If your room is tighter, the UK single needs at least 2.1m x 2.8m by our guidance, but you give up 30cm of width.
Spring King Memory Ortho UK small double or double: which should I choose?
The UK small double is 15cm narrower than the UK double and the same length. For one sleeper or occasional sharing, the UK small double suits smaller rooms. For a couple every night, the UK double gives 67.5cm each, and we suggest at least 2.6m x 2.8m for it.
Is the Spring King Memory Ortho small double long enough if I'm tall?
The UK small double is 190cm long, or 6ft 3in, the same as the UK single and UK double. If your feet already reach the end of a standard bed, the UK king is 10cm longer, although it is also 30cm wider and needs at least 2.7m x 2.9m.
Is the Spring King Memory Ortho UK small double good for a guest room?
Yes, if couples stay only now and then. The width is fine for a night or two, and the firm feel suits most guests. The open coils do carry movement, which is easy to live with for a short visit but can grate on a couple sharing every night.
Should a teenager move from a single to a Spring King Memory Ortho small double?
If the room can take it, a UK small double adds 30cm of width at the same 190cm length, so a growing teenager gains space to turn over. The firm support suits most younger sleepers, although a very light side sleeper may find it a little unyielding at the shoulder.