Why king size makes sense for most couples#

A UK king size mattress (150 × 200 cm) gives each partner 75 cm of sleeping width, 15 cm more than a double per person, and 10 cm more length. For average-height couples, this is a meaningful upgrade. The additional length (200 cm vs 190 cm on a double) also benefits taller sleepers.

King size mattresses are available from virtually every UK mattress brand, with prices typically 20–30% higher than the equivalent double. All prices below are approximate king-size sale prices.

Best overall king: Simba Hybrid (~£900 on sale)#

The Simba Hybrid's combination of medium firmness, good motion isolation (via the micro-spring layer), excellent temperature regulation (dual springs) and strong edge support make it one of the most versatile king-size mattresses for couples in the UK. The 200-night trial lets both partners assess it properly over time.

Best value king: OTTY Hybrid (~£650 on sale)#

OTTY's king-size hybrid delivers genuine hybrid performance at a price that undercuts Simba and Emma by a meaningful margin. The 5 cm gel-foam comfort layer provides pressure relief, the pocket-spring base provides support and airflow, and the bamboo cover is breathable. Best-value king-size hybrid in the UK market.

Best premium king: Brook + Wilde Elite (~£1,000–£1,200)#

Brook + Wilde's availability in soft, medium and firm at king size is a significant advantage for couples, you can order two king-size singles in different firmnesses and zip them together for a bespoke sleep surface. The natural wool fillings and dual spring system also make it one of the coolest-sleeping kings in the mid-premium segment.

Best memory foam king: Nectar Original (~£550 on sale)#

For couples who prioritise motion isolation over temperature, Nectar's king size all-foam mattress provides the best pressure relief and movement absorption in the sub-£600 king tier. The 365-night trial is especially valuable at king-size price points where a poor fit is more costly to resolve.

Buying tips for king size#

  • Measure your room first: Allow at least 60 cm clearance on each side of the bed and at the foot. A 150 cm wide king in a 10′ (304 cm) wide room leaves only 77 cm on each side, workable but snug.
  • Check stair access: Full-size king mattresses (even compressed) require adequate stair and door clearance. Measure before ordering if you're in a flat above ground floor.
  • Buy the base at the same time: King-size bases need to match the mattress size exactly. Mixing brands is fine as long as dimensions align.

The king-size picks from our catalogue#

A king (150 × 200cm) is the size most couples should buy, and at this size the priorities are motion isolation, edge support and enough depth to stay supportive across the whole width. These are our picks.

ModelTypeDepthFeelSupportComfortPrice (double)Why it is here
Luxe Velour HybridHybrid28cmMedium8.28.4£399Best value sprung king for a couple
Emma OriginalFoam25cmMedium8.48.9£469Best motion isolation; 200-night trial
Emma Original ProHybrid25cmMedium-firm9.08.8£699Zoned springs for mixed sleeping positions
LuxeErgo 3400 HybridHybrid31cmFirm9.09.0£464 (sale)Firm, deep, our top scorer; heavier couples
Luxe-Latex Natural Pillow Top 5000Latex hybrid33cmMedium-firm9.09.0£674 (sale)The premium natural king

Prices are for a double at the time of writing (September 2026), using the sale price where the brand runs a permanent one. Full scores are on each review page. We may earn a commission if you buy through our links, at no extra cost to you; it never affects a score.

Prices in the table are for a double; every model is also made in single, king and super king, and The Foam People cut non-standard sizes to order. Buy the base at the same time and confirm it is a UK king (150 × 200cm), not a US or EU king, which differ. Our divan vs bed frame guide covers the base decision.