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King Size Mattresses

King size mattresses offer complete comfort. Forget sleeping like sardines, you and your other half will never argue about bed hogging with this 5’ x 6’6” mattress.

A king size mattress is perfect if you have a large bedroom. Why choose any other than a king size mattress if you’ve got the space to play with? You’ll sleep better at night as you’ll have the freedom to toss and turn without disturbing your partner’s sleep.

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  1. SUMMER SALE
    1
    Signature Crystal 3000 Pocket Sprung Orthopaedic Natural Mattress
    (391)
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    RRP From £529.99 Save £290 Now From £239.99
  2. SUMMER SALE
    1
    Supreme Ortho Spring Reflex Foam Orthopaedic Extra Firm Mattress
    (217)
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    RRP From £239.99 Save £100 Now From £139.99
  3. SUMMER SALE
    1
    Super Ortho Spring Reflex Foam Orthopaedic Medium Firm Mattress
    (378)
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    RRP From £229.99 Save £90 Now From £139.99
  4. SUMMER SALE
    Deluxe Memory Spring Rolled Mattress
    Deluxe Memory Spring Rolled Mattress
    (118)
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    RRP From £199.99 Save £80 Now From £119.99
  5. SUMMER SALE
    Ocean Gel Pocket 2000 Memory Foam Cool Orthopaedic Mattress
    Ocean Gel Pocket 2000 Memory Foam Cool Orthopaedic Mattress
    (54)
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    RRP From £329.99 Save £150 Now From £179.99
  6. SUMMER SALE
    Touch 3-Zone Memory Foam Orthopaedic Rolled Mattress
    Touch 3-Zone Memory Foam Orthopaedic Rolled Mattress
    (84)
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    RRP From £249.99 Save £110 Now From £139.99
  7. SUMMER SALE
    Deluxe Reflex Spring Rolled Mattress
    Deluxe Reflex Spring Rolled Mattress
    (31)
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    RRP From £189.99 Save £90 Now From £99.99
  8. SUMMER SALE
    1
    Ortho Royale Spring Orthopaedic Mattress
    (263)
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    RRP From £229.99 Save £100 Now From £129.99
  9. SUMMER SALE
    Flex 1000 Reflex Foam Orthopaedic Mattress
    Flex 1000 Reflex Foam Orthopaedic Mattress
    (43)
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    RRP From £229.99 Save £100 Now From £129.99
  10. SUMMER SALE
    Pocket Flexi 1000 Individual Sprung Reflex Foam Orthopaedic Mattress
    Pocket Flexi 1000 Individual Sprung Reflex Foam Orthopaedic Mattress
    (61)
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    RRP From £299.99 Save £130 Now From £169.99
  11. SUMMER SALE
    1
    Signature Platinum 2000 Pocket Sprung Orthopaedic Natural Mattress
    (141)
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    RRP From £459.99 Save £230 Now From £229.99
  12. SUMMER SALE
    Touch 7-Zone Memory Foam Orthopaedic Rolled Mattress
    Touch 7-Zone Memory Foam Orthopaedic Rolled Mattress
    (41)
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    RRP From £279.99 Save £130 Now From £149.99
  13. SUMMER SALE
    1
    Balmoral 3500 Pocket Sprung Memory Foam Mattress
    (89)
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    RRP From £389.99 Save £170 Now From £219.99
  14. SUMMER SALE
    1
    Maestro Spring Memory Foam Tufted Mattress
    (107)
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    RRP From £269.99 Save £110 Now From £159.99
  15. SUMMER SALE
    1
    Bamboo Vitality 2000 Pocket Sprung Memory and Reflex Foam Mattress
    (55)
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    RRP From £519.99 Save £250 Now From £269.99
  16. SUMMER SALE
    Ocean Gel Memory and Reflex Foam Cool Orthopaedic LayGel Mattress
    Ocean Gel Memory and Reflex Foam Cool Orthopaedic LayGel Mattress
    (93)
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    RRP From £329.99 Save £150 Now From £179.99
  17. SUMMER SALE
    1
    Signature Silver 1400 Pocket Sprung Orthopaedic Natural Mattress
    (67)
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    RRP From £389.99 Save £190 Now From £199.99
  18. SUMMER SALE
    Comfort Ortho 1400 Pocket Sprung Mattress
    Comfort Ortho 1400 Pocket Sprung Mattress
    (46)
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    RRP From £349.99 Save £150 Now From £199.99
  19. SUMMER SALE
    1
    Mirage Spring Quilted Bamboo Fabric Natural Fillings Mattress
    (50)
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    RRP From £249.99 Save £100 Now From £149.99
  20. SUMMER SALE
    Membound Memory Foam Spring Mattress
    Membound Memory Foam Spring Mattress
    (60)
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    RRP From £219.99 Save £90 Now From £129.99
  21. SUMMER SALE
    1
    Majestic 1000 Pocket Sprung Orthopaedic Mattress
    (187)
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    RRP From £269.99 Save £110 Now From £159.99
  22. SUMMER SALE
    Fusion Lite Memory and Reflex Foam Orthopaedic Mattress
    Fusion Lite Memory and Reflex Foam Orthopaedic Mattress
    (13)
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    RRP From £269.99 Save £120 Now From £149.99
  23. SUMMER SALE
    1
    Cashmere 3000 Pocket Sprung Memory Foam Mattress
    (86)
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    RRP From £399.99 Save £180 Now From £219.99
  24. SUMMER SALE
    1
    Memflex Spring Memory and Reflex Foam Orthopaedic Mattress
    (55)
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    RRP From £279.99 Save £110 Now From £169.99

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Sleep Like a King on a King Size Mattress

You’re certain to sleep well on a king size mattress, but if you’re after something even more spacious, then consider our super king size mattress range - here at Happy Beds, there’s something for everyone. Browse our selection of king size mattresses today and find the right one for you.

Frequently Asked Questions

  • How big is a king size mattress?

    A king mattress offers the ultimate in luxury and space, measuring 150cm x 200cm, or 5.0ft x 6.6ft. Whether you're a couple who wants extra space at night or just a solo sleeper wanting to sleep like royalty, our king size mattresses are guaranteed to do the job.

  • Are there different fillings available with king size mattresses?

    We offer a range of mattress fillings to suit any sleeping position or support needs, including:

  • What mattress structures are available with king size mattresses?

    The mattress structure you choose can affect how your comfort throughout the night, which is why you should do careful research before purchasing anything. Our king size mattresses included the following structures:

  • Is a king size mattress right for you?

    Forget sleeping like sardines! You and your other half will never argue about bed hogging with these spacious wonders. With more than enough space to toss and turn without imposing on your partner, it’s easy to see why it is a fan favourite. Perfect if you have a large bedroom or if you’re tall and need those extra few inches to avoid your feet hanging off the end, a king size mattress really adds that special touch.

    Are you not sure on whether a king size mattress will suit you best, whether you need some of the special features, or whether you'll have the space to accommodate one? Take a look at our Mattress Buying Guide and our Measuring Guide. to find out more