Step 1: Identify your sleep position#

Your sleep position is the single most important factor in mattress selection. Most people have a dominant sleep position even if they move during the night.

  • Side sleeper: Needs cushioning to relieve shoulder and hip pressure. Look for medium-soft to medium firmness.
  • Back sleeper: Needs support under the lumbar curve without excessive sink. Look for medium to medium-firm.
  • Stomach sleeper: Needs a firmer surface to prevent hips sinking and the lumbar spine hyperextending. Look for medium-firm to firm. Also consider changing position if possible — stomach sleeping is associated with neck and back strain.
  • Combination sleeper: Moves between positions. Needs a responsive mattress that adapts. A medium hybrid often works best.

Step 2: Consider your weight#

Your weight affects how any mattress feels. As a guideline:

  • Under 9 stone (57 kg): Compress mattresses less. Consider softer than standard firmness recommendations.
  • 9–14 stone (57–90 kg): Compress mattresses as manufacturers intend. Standard recommendations apply.
  • Over 14 stone (90 kg): Compress mattresses more. Consider one firmness step firmer than the standard recommendation, and prioritise hybrid or higher-density foam for durability.

Step 3: Decide between types#

  • All-foam: Best pressure relief, best motion isolation, lower price. Warmer-sleeping.
  • Hybrid (foam + pocket springs): Better temperature regulation, more responsive, better edge support, more durable. Higher price.
  • Latex: Most responsive foam option, excellent temperature regulation, longest-lasting. Highest price among foam types.
  • Traditional pocket-sprung: British heritage, natural fillings available, often double-sided. Best at premium tier.

Step 4: Set a realistic budget#

UK mattress prices span from under £100 for a single entry-level to over £5,000 for a super king bespoke model. Realistic quality bands for a double mattress:

  • Under £300: Entry-level foam or open-coil. Adequate for spare rooms and short-term use.
  • £300–£500: Quality all-foam (Emma, Nectar) or budget hybrid. Suitable as a primary mattress for 7–10 years.
  • £500–£900: Quality hybrid (Simba, OTTY, Eve Hybrid). Best all-round for most UK adult sleepers.
  • £900–£2,000: Premium hybrid (Brook + Wilde, Saatva) or entry-level traditional (Hypnos Origins).
  • £2,000+: Luxury traditional (Hypnos, Vi-Spring) expected to last 15–25 years.

Step 5: Check the trial period and guarantee#

A trial period is essential when buying online — you cannot properly assess a mattress in 10 minutes in a showroom or in a single night. Minimum recommended trial period: 90 nights. Brands offering 200–365 nights (Emma, Simba, Nectar) provide the most confidence. Check the returns process: free collection is standard among online brands; check whether the brand donates or recycles returned mattresses.

Guarantee: look for at least 10 years. Read what the guarantee covers — most exclude staining (reason to buy a protector immediately) and what's defined as "normal wear."

Step 6: Choose the right size#

See our full UK mattress sizes guide for exact dimensions. As a summary: double is appropriate for most couples in standard UK bedrooms; king if you have space and budget; super king for maximum sleep space. Always measure your room before ordering.

Step 7: Use a comparison tool#

With your sleep position, weight, type preference, budget and size established, use our mattress comparison page to filter by these criteria and compare the best matching options side by side. Our 60-second quiz can also generate a personalised recommendation based on your specific answers.

Common buying mistakes to avoid#

  • Buying on feel alone in a showroom: A 10-minute lie-down tells you little about long-term suitability. Always buy with a trial period.
  • Buying too firm "for support": Research does not support firm mattresses as universally better for back health. Match firmness to your sleep position.
  • Not buying a mattress protector: An unprotected mattress voids most warranties after the first stain. Buy a protector at the same time as the mattress.
  • Ignoring your partner's needs: A mattress that suits one partner but not the other affects both partners' sleep quality. Take both into account, or use a zip-link solution.