Best King Size Mattress UK 2026
Buy Emma Original in King. Frame is already 150 × 200cm (5'0" × 6'6"). Shop King on the official product page — from-prices here are the cheapest size, not King.
Updated 5 September 2026. We may earn a commission. Disclosure. Slept on by our UK testing team.
Which King to buy
Every button opens the official product page. Select King 150 × 200cm before checkout.
Emma Original
James Wright’s default King. Mixed positions. Pick 150 × 200cm on the Emma product page.
Skip if: You want hotel bounce — that is Simba Hybrid.
200 nights · pick King 150 × 200cm
Shop King Emma Original — from £349 ReviewSimba Hybrid
Firmer edge, more spring. The Simba to buy in King.
Skip if: Partner rolls a lot — climb to Pro.
200 nights · pick King 150 × 200cm
Shop King Simba Hybrid — from £699 ReviewSimba Hybrid Pro
Rachel Adams’s motion pick. Dual springs + wool. Select King 150 × 200cm.
Skip if: You only wanted Simba bounce — Hybrid is enough.
200 nights · pick King 150 × 200cm
Shop King Simba Pro — from £899 ReviewEmma Original Lite
Real hybrid on a King frame. Guest room or tight budget.
Skip if: Nightly side sleep — stretch to Original.
200 nights · pick King 150 × 200cm
Shop King Emma Lite — from £289 ReviewNectar Classic Memory Foam
Lowest from-price here. A year to decide. Select King on Nectar.
Skip if: You sleep hot or sit the edge — Classic Hybrid.
365 nights · pick King 150 × 200cm
Shop King Nectar Foam — from £199 ReviewEmma Original Elite
Sarah Mitchell if Original perched her shoulder. AirGrid. Wait for a sale.
Skip if: Rachel Adams’s stomach veto — Elite is too soft.
200 nights · pick King 150 × 200cm
Shop King Emma Elite — from £649 ReviewUK King is 150 × 200cm
5'0" × 6'6". Two people get 75cm each. Length is 200cm. That is the size you already chose.
Buy this
King 150 × 200cm
Frame is King. Shop King. Do not “upgrade” on the product page to Super King.
Not US King
US King ≠ UK King
US King is 193 × 203cm. US Queen is the near-miss. Buy UK King bedding.
Our UK testing team — which King
Same five who sleep the homepage shortlist. Weight and position, then the King model.
| Tester | Buy this King |
|---|---|
 James Wright 86kg · Back/side combination | Emma Original in King. 150 × 200cm. That is the nightly bed. |
 Sarah Mitchell 62kg · Side sleeper | Original first. Elite if the shoulder still perches. Not Lite for nightly side sleep. |
 Emma Thompson 71kg · Side-dominant combination | Original or Simba Hybrid. Hot sleepers: Simba’s graphite, not Elite height for heat alone. |
 Rachel Adams 68kg · Mixed positions (physio lens) | Same King, less travel: Simba Pro. Emma Original if the budget is tighter. |
 David Patel 104kg · Back sleeper; sits on the edge | Simba Hybrid or OTTY Extra Firm. Skip Elite. Soft King + 104kg = hammock. |
More King shop links
Still King 150 × 200cm. Different brand door.
OTTY Extra Firm Hybrid
From £524.99
David Patel (104kg, back). Flippable 9/10 or 10/10.
Shop King OTTY Extra Firm ReviewSilentnight Lift Replenish Hybrid 2000
From £569
Latex + 2000 Mirapocket. 60-night trial. We have not slept this yet.
Shop King Silentnight Review