Mattress Buying Guide UK (2026)
Updated for 2026 · Prices checked in £ · UK standard sizes.
Mattress marketing is some of the most confusing in all of furniture: "orthopaedic", "gel-infused", "7-zone" — half of it means very little. What actually matters is simpler: the right firmness for how you sleep, decent materials that don't sag in two years, and the correct UK size. A quick note: our featured store, UK Furniture Online, doesn't sell standalone mattresses — its beds come with mattresses included (see our bed picks). So this page is a straight buying guide: how to choose the right type, firmness and size, and the trusted UK mattress retailers to buy from below.
Quick reference: mattress types at a glance
| Type | Best for | Typical double price |
|---|---|---|
| Memory foam | Couples, side sleepers | £250–£500 |
| Pocket sprung | Hot sleepers, traditional feel | £300–£700 |
| Hybrid | Best all-rounder | £400–£800 |
| Orthopaedic | Firm-support back sleepers | £250–£550 |
Quick buying tips
- Match your sleep position. Side sleepers need medium/medium-soft for shoulder and hip relief; back sleepers need medium-firm; front sleepers need firm.
- Use the sleep trial. Your body needs 3–4 weeks to adjust. A 100-night trial is only useful if you actually commit to the adjustment period.
- Protect it from day one. A £30 waterproof protector guards a £500 mattress — and most guarantees are voided by stains.
- Check the base. Foam mattresses need solid or closely-spaced slats (gaps under 7 cm); sprung mattresses are more forgiving.
- Measure your stairs. A king-size mattress doesn't bend around tight Victorian staircases — consider a mattress-in-a-box.
Mattress FAQs
What type of mattress is best for back pain?
A medium-firm mattress usually suits back pain best — firm enough to support the spine's natural curve, with enough give at the shoulders and hips. Orthopaedic (extra-firm) mattresses help some back sleepers but can cause pressure points for side sleepers.
Memory foam or pocket sprung — which is better?
Memory foam moulds to your body and isolates movement (good for couples) but can sleep warm. Pocket sprung mattresses breathe better and feel more traditional, with each spring responding independently. Hybrids combine both. Hot sleepers should lean sprung or hybrid.
How often should you replace a mattress in the UK?
Every 7–8 years is the standard guidance. Replace sooner if you wake with aches, the mattress visibly sags, or you sleep better in other beds. A mattress protector can add a year or two of life.
What mattress size do I need for a UK double bed?
A UK double mattress is 135 × 190 cm; a king is 150 × 200 cm; a single is 90 × 190 cm. Buy the mattress in exactly the same size as your bed frame — a 2 cm gap each side is normal, more than that means the wrong size.
Do mattresses in a box work as well as traditional ones?
Yes — vacuum-packed mattresses expand to full size within 24–72 hours and perform like traditional ones. They're far easier to get upstairs in UK homes with narrow staircases. Unwrap within a few weeks of delivery for best expansion.
You may also like: 4 Best Beds in the UK (2026) · How to Choose a Bed: UK Buying Guide
Where to buy: trusted UK mattress retailers
Specialist UK mattress retailers with sleep trials and solid guarantees — compare before you buy.