Spring King Premier Mattress
Mattress
Spring King Premier Mattress
Size
Firmness
Medium
Construction
Depth (cm)
22
Layers
3
Layer Details
- Knitted Cover. A soft knitted cover that breathes well, which means heat is less likely to build up around you overnight. It should help keep your temperature fairly even until morning.
- Reflex Foam. A generous layer of reflex foam that contours to your shape, cushioning your frame at every curve. You feel this as gentle give at pressure points rather than a deep sink.
- Open Coil Springs. An open coil system made from high-tensile steel joined in a lattice shape, giving medium tension support across your whole body. Open coils move together as one unit, so expect a slightly bouncier, more connected feel than pocket springs.
Layer details from mattressnextday.co.uk product page, September 2026.
- Space to spread out on your own: At 30cm wider than the UK single, the UK small double lets you lie diagonally or starfish across the reflex foam without an arm dropping off the edge.
- Floor space for compact bedrooms: Being 15cm narrower than the UK double, the UK small double can leave enough clearance for a door to swing open or a wardrobe to be reached in a box room.
- Easier fit in a loft conversion: Under a sloping ceiling, the narrower 4ft x 6ft 3in footprint can push the bed further from the low wall, giving you a side where you can stand up straight.
- A sensible step up for teenagers: If your teenager has outgrown a UK single, the UK small double adds width at the same 190cm length, so you keep most of the floor they use for a desk.
- Fine for the odd night together: A visiting couple will manage a night or two, although on open coils each of you will feel the other turning over.
This size suits you if...
You sleep alone and want room to stretch out, your bedroom or loft conversion is too tight for a standard double, or the bed will mostly host one person with a couple staying only for the occasional weekend.
Consider another size if...
You share the bed every night, because open coils pass movement across a narrow surface. We'd recommend the UK double instead, which gives 67.5cm each; allow at least 2.6m x 2.8m.
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Is the Spring King Premier small double big enough for one adult?
For most solo sleepers, yes. The UK small double is 30cm wider than the UK single at the same length, so you can shift position freely during the night. The 190cm length is the limit to consider: if you are very tall, check that your feet will not hang over the end before you buy.
Will a Spring King Premier small double fit in a box room?
Often, yes, which is the main reason to pick the UK small double over the UK double. We suggest a room of at least 2.4m x 2.8m. Measure where the door opens and where drawers pull out, because a few centimetres of clearance on one side is usually what decides whether the bed works.
Is the Spring King Premier small double good for a guest room?
Yes, if your guests are mostly single visitors or couples staying a night or two. The medium feel suits a wide range of sleepers. Couples will notice each other moving on the open coil springs, which is easy to live with for a short stay and harder to live with every night.
Spring King Premier small double or double: which should I choose?
Choose the UK small double if you sleep alone or your room is tight, since it is 15cm narrower than the UK double at the same length. If two of you sleep together every night, the UK double gives 67.5cm each, and we suggest allowing at least 2.6m x 2.8m for that bed.
What size is the Spring King Premier small double in feet?
The UK small double measures 4ft x 6ft 3in, or 120 x 190cm, and those figures match standard 4ft frames and fitted sheets. The prices shown on this page are updated as retailers change them, so compare the listings here before you choose.