King Size Mattresses

King Size Mattresses

At Dormeo, we have a fantastic range of luxuriously comfy and supportive king-size mattresses (150cm x 200cm) that provide a roomier alternative to a double. Shop the range below to find your ideal style. 

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  1. Dormeo S Plus Memory Foam Mattress, King
    Comfort: Multi
    Depth: 20cm
    Dormeo S Plus Memory Foam Mattress, King
    £499.99 Was £999.99 Save £500.00
  2. Octasmart Hybrid Plus Mattress, King
    Comfort: Medium
    Depth: 22cm
    Octasmart Hybrid Plus Mattress, King
    £799.00 Was £1,599.00 Save £800.00
  3. Octasmart Plus Memory Foam Mattress, King
    Comfort: Medium
    Depth: 17cm
    Octasmart Plus Memory Foam Mattress, King
    £999.99
  4. Octasmart Deluxe Memory Foam Mattress, King
    Comfort: Medium/Soft
    Depth: 19cm
    Octasmart Deluxe Memory Foam Mattress, King
    £1,099.99
  5. Dormeo Octasense Memory Foam Mattress, King
    Comfort: Medium/Firm
    Depth: 18cm
    Dormeo Octasense Memory Foam Mattress, King
    £599.99
  6. Octaspring HYBRID Mattress, King
    Comfort: Medium/Firm
    Depth: 27cm
    Octaspring HYBRID Mattress, King
    £1,449.99
  7. Octaspring HYBRID Plus Mattress, King
    Comfort: Medium
    Depth: 27cm
    Octaspring HYBRID Plus Mattress, King
    £1,699.99
  8. Octaspring TRIBRID Latex Hybrid Mattress, King
    Comfort: Medium/Firm
    Depth: 27cm
    Octaspring TRIBRID Latex Hybrid Mattress, King
    £1,929.99
  9. Octaspring 9500 Latex Memory Foam Mattress, King
    Comfort: Medium
    Depth: 30cm
    Octaspring 9500 Latex Memory Foam Mattress, King
    £3,079.99
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A king-size mattress is 15cm wider and 10cm longer than a standard double mattress, meaning it offers plenty of space to stretch out — perfect for taller or heavier sleepers. They’re the perfect middle ground if you like space to relax, but can't quite fit a super king-size into your room.

As well as being incredibly spacious, our king mattresses are exceptionally comfortable and supportive, allowing you to enjoy a luxurious night's rest. And, we carry this size in all of our best collections, including our Memory, Fresh, and Octaspring mattresses, so you'll be able to find the exact style that matches your sleeping needs. And, with our 60-night comfort guarantee, you’ve got a full two months to decide whether your mattress is right for you.

Add some of our premium king-size bedding and a mattress topper to further enhance your sleeping experience. You’ll also need a supportive base: our king-size beds provide the ideal foundation. 

Should you have any questions about our king-size bed mattresses, you can get in touch with our team at [email protected] or 0800 625 0134. They'll be happy to answer your queries or provide more information.

We offer free UK tracked delivery, so order a king size mattress from our online store today. Alternatively, take a look at our European king-size mattresses, which are an extra 10cm wider. Of course, if you have enough room, you could push the boat out with a super king mattress: the largest and most luxurious size we offer. Measuring 180cm by 200cm, they’re twice as wide as a single mattress

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Dormeo UK Limited trading as Dormeo, is registered in England and Wales no. 07440398. Registered address: Wye House, 376 London Road, High Wycombe, Buckinghamshire, HP11 1LH. Dormeo UK Limited is Authorised and Regulated by the Financial Conduct Authority as a Consumer Credit Firm under firm number 627302. Klarna Bank AB (publ) is Authorised by the Swedish Financial Services Authority (Finansinspektionen) and is subject to limited regulation by the Financial Conduct Authority. Registered office: Sveavägen 46, 111 34 Stockholm, Sweden. Corporation ID number: 556737-0431.