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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.

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.

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  1. 45% OFF
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    Aloe Vera 1500 Pocket Sprung Memory and Reflex Foam Mattress

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    RRP From £354.99 Now From £194.99
  2. 42% OFF
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    Memflex Spring Memory and Reflex Foam Orthopaedic Mattress

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    RRP From £249.99 Now From £144.99
  3. 42% OFF
    Christmas Sale
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    Mirage Spring Quilted Bamboo Fabric Natural Fillings Mattress

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    RRP From £224.99 Now From £129.99
  4. 42% OFF
    Christmas Sale
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    Eclipse Pocket Sprung 800 Quilted Fabric Mattress

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    RRP From £214.99 Now From £124.99
  5. 51% OFF
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    Signature 2000 Pocket Sprung Pillow Top Natural Fillings Mattress

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    RRP From £494.99 Now From £244.99
  6. 44% OFF
    Christmas Sale
    Richmond 3000 Pocket Sprung Natural Fillings Mattress
    Richmond 3000 Pocket Sprung Natural Fillings Mattress

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    RRP From £404.99 Now From £224.99
  7. 45% OFF
    Christmas Sale
    Little Champ 800 Pocket Sprung Reflex Foam Orthopaedic Mattress
    Little Champ 800 Pocket Sprung Reflex Foam Orthopaedic Mattress

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    RRP From £234.99 Now From £129.99
  8. 47% OFF
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    Signature Gold 1800 Pocket Sprung Orthopaedic Natural Fillings Mattress

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    RRP From £359.99 Now From £189.99
  9. 45% OFF
    Christmas Sale
    Imperial 3500 Pocket Sprung Mattress
    Imperial 3500 Pocket Sprung Mattress

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    RRP From £354.99 Now From £194.99
  10. 48% OFF
    Christmas Sale
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    Star Spring Quilted Fabric Mattress

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    RRP From £154.99 Now From £79.99
  11. 49% OFF
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    Bamboo Vitality 2000 Pocket Sprung Memory and Reflex Foam Mattress

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    RRP From £459.99 Now From £234.99
  12. 42% OFF
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    Clifton Royale 1000 Pocket Sprung Orthopaedic Mattress

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    RRP From £264.99 Now From £154.99
  13. 44% OFF
    Christmas Sale
    SleepSoul Space 2000 Pocket Spring Pillowtop Mattress
    SleepSoul Space 2000 Pocket Spring Pillowtop Mattress

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    RRP From £539.99 Now From £299.99
  14. 44% OFF
    Christmas Sale
    SleepSoul Bliss 800 Pocket Spring and Memory Foam Pillowtop Mattress
    SleepSoul Bliss 800 Pocket Spring and Memory Foam Pillowtop Mattress

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    RRP From £449.99 Now From £249.99
  15. 45% OFF
    Christmas Sale
    Ortho Sleep 1500 Reflex Foam Orthopaedic Mattress
    Ortho Sleep 1500 Reflex Foam Orthopaedic Mattress

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    RRP From £209.99 Now From £114.99
  16. 45% OFF
    Christmas Sale
    Fusion Lite Memory and Reflex Foam Orthopaedic Mattress
    Fusion Lite Memory and Reflex Foam Orthopaedic Mattress

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    RRP From £219.99 Now From £119.99
  17. 44% OFF
    Christmas Sale
    Lavender 3000 Pocket Sprung Memory Foam Mattress
    Lavender 3000 Pocket Sprung Memory Foam Mattress

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    RRP From £359.99 Now From £199.99
  18. 62% OFF
    Christmas Sale
    Panda Memory Foam Bamboo Mattress Topper
    Panda Memory Foam Bamboo Mattress Topper
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    RRP From £264.99 Now From £99.95
  19. 48% OFF
    Christmas Sale
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    Anti-Bed Bug 1500 Pocket Sprung Memory, Latex and Reflex Foam Pillow Top Mattress

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    RRP From £554.99 Now From £289.99
  20. 48% OFF
    Christmas Sale
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    Tennyson 4000 Twin Pocket Sprung Air Flow Orthopaedic Natural Fillings Mattress

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    RRP From £704.99 Now From £369.99
  21. 45% OFF
    Christmas Sale
    Impressions 6000 Cool Blue Memory and Reflex Foam Orthopaedic Mattress
    Impressions 6000 Cool Blue Memory and Reflex Foam Orthopaedic Mattress

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    RRP From £309.99 Now From £169.99
  22. 48% OFF
    Christmas Sale
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    Windsor 3000 Pocket Sprung Orthopaedic Pillow Top Mattress

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    RRP From £819.99 Now From £429.99
  23. 45% OFF
    Christmas Sale
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    Milk Vitality 2000 Pocket Sprung Memory, Latex and Reflex Foam Mattress

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    RRP From £459.99 Now From £254.99
  24. 48% OFF
    Christmas Sale
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    Ambassador 3000 Pocket Sprung Orthopaedic Natural Fillings Mattress

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    RRP From £639.99 Now From £334.99

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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.

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

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:

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