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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. 41% OFF
    March Sale
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    Super Ortho Spring Reflex Foam Orthopaedic Medium Firm Mattress

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    RRP From £204.99 Now From £119.99
  2. 55% OFF
    March Sale
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    Signature Crystal 3000 Pocket Sprung Orthopaedic Natural Fillings Mattress

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    was_price_is_HAPPY_BEDS_SIGNATURE_CRYSTAL_3.6402|0.00
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    RRP From £474.99 Now From £214.99
  3. 46% OFF
    March Sale
    Deluxe Memory Spring Rolled Mattress
    Deluxe Memory Spring Rolled Mattress

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    was_price_is_DELUXE_MEMORY_SPRING_ROLLED_MA.2717|0.00
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    RRP From £174.99 Now From £94.99
  4. 51% OFF
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    Signature 2000 Pocket Sprung Pillow Top Natural Fillings Mattress

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    was_price_is_HAPPY_BEDS_SIGNATURE_2000_NATU.1332|0.00
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    RRP From £494.99 Now From £244.99
  5. 45% OFF
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    Cashmere 3000 Pocket Sprung Memory Foam Mattress

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    was_price_is_HAPPY_BEDS_CASHMERE_3000_POCKE.9346|0.00
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    RRP From £354.99 Now From £194.99
  6. 45% OFF
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    Balmoral 3500 Pocket Sprung Memory Foam Mattress

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    was_price_is_HAPPY_BEDS_BALMORAL_3500_POCKE.2253|0.00
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    RRP From £344.99 Now From £189.99
  7. 45% OFF
    March Sale
    Touch 3-Zone Memory Foam Orthopaedic Rolled Mattress
    Touch 3-Zone Memory Foam Orthopaedic Rolled Mattress

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    was_price_is_VISCO_3_ZONE_MATTRESS.935|0.00
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    RRP From £219.99 Now From £119.99
  8. 43% OFF
    March Sale
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    Ortho Royale Spring Orthopaedic Mattress

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    was_price_is_HAPPY_BEDS_ORTHO_ROYALE_ORTHOP.8680|0.00
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    RRP From £199.99 Now From £114.99
  9. 45% OFF
    March Sale
    Ocean Gel Memory and Reflex Foam Cool Orthopaedic LayGel Mattress
    Ocean Gel Memory and Reflex Foam Cool Orthopaedic LayGel Mattress

    Soft
    Medium
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    was_price_is_VISCO_GEL_MEMORY_MATTRESS.2736|0.00
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    RRP From £279.99 Now From £154.99
  10. 42% OFF
    March Sale
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    Supreme Ortho Spring Reflex Foam Orthopaedic Extra Firm Mattress

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    was_price_is_HAPPY_BEDS_SUPREME_ORTHO_ORTHO.2079|0.00
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    RRP From £214.99 Now From £124.99
  11. 41% OFF
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    Pinerest Spring Semi-Orthopaedic Quilted Fabric Mattress

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    was_price_is_HAPPY_BEDS_PINEREST_TRADITIONA.2364|0.00
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    RRP From £169.99 Now From £99.99
  12. 41% OFF
    March Sale
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    Neptune Spring Quilted Cotton Fabric Mattress

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    was_price_is_HAPPY_BEDS_NEPTUNE_QUILTED_MAT.4539|0.00
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    RRP From £169.99 Now From £99.99
  13. 42% OFF
    March Sale
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    Majestic 1000 Pocket Sprung Orthopaedic Mattress

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    was_price_is_HAPPY_BEDS_MAJESTIC_POCKET_SPR.6718|0.00
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    RRP From £239.99 Now From £139.99
  14. 51% OFF
    March Sale
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    Signature Platinum 2000 Pocket Sprung Orthopaedic Natural Fillings Mattress

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    was_price_is_HAPPY_BEDS_SIGNATURE_PLATINUM_.9325|0.00
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    RRP From £409.99 Now From £199.99
  15. 44% OFF
    March Sale
    Ocean Gel Pocket 2000 Memory and Reflex Foam Individual Sprung Cool Orthopaedic LayGel Mattress
    Ocean Gel Pocket 2000 Memory and Reflex Foam Individual Sprung Cool Orthopaedic LayGel Mattress

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    was_price_is_VISCO_GEL_MEMORY_POCKET_2000_M.9431|0.00
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    RRP From £269.99 Now From £149.99
  16. 42% OFF
    March Sale
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    Memflex Spring Memory and Reflex Foam Orthopaedic Mattress

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    was_price_is_HAPPY_BEDS_MEMORY_FLEX_ORTHOPA.3576|0.00
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    RRP From £249.99 Now From £144.99
  17. 45% OFF
    March Sale
    Touch 7-Zone Memory Foam Orthopaedic Rolled Mattress
    Touch 7-Zone Memory Foam Orthopaedic Rolled Mattress

    Soft
    Medium
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    was_price_is_VISCO_7_ZONE_MATTRESS.9172|0.00
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    RRP From £234.99 Now From £129.99
  18. 48% OFF
    March Sale
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    Tennyson 4000 Twin Pocket Sprung Air Flow Orthopaedic Natural Fillings Mattress

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    was_price_is_HAPPY_BEDS_TENNYSON_4000_TWIN_.6173|0.00
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    RRP From £704.99 Now From £369.99
  19. 44% OFF
    March Sale
    Forest Dream 3000 Pocket Sprung Mattress
    Forest Dream 3000 Pocket Sprung Mattress

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    was_price_is_FOREST_DREAM_3000_MATTRESS.3184|0.00
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    RRP From £359.99 Now From £199.99
  20. 44% OFF
    March Sale
    Comfort Ortho 1400 Pocket Sprung Mattress
    Comfort Ortho 1400 Pocket Sprung Mattress

    Soft
    Medium
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    was_price_is_HAPPY_BEDS_COMFORT_ORTHO_1400_.8341|0.00
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    RRP From £314.99 Now From £174.99
  21. 42% OFF
    March Sale
    Membound Memory Foam Spring Mattress
    Membound Memory Foam Spring Mattress

    Soft
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    was_price_is_HAPPY_BEDS_MEMBOUND_MEMORY_FOA.1350|0.00
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    RRP From £189.99 Now From £109.99
  22. 47% OFF
    March Sale
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    Signature Gold 1800 Pocket Sprung Orthopaedic Natural Fillings Mattress

    Soft
    Medium
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    was_price_is_HAPPY_BEDS_SIGNATURE_GOLD_1800.2070|0.00
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    RRP From £359.99 Now From £189.99
  23. 45% OFF
    March Sale
    Ultimate Ortho Reflex Foam Support Orthopaedic Rolled Extra Firm Mattress
    Ultimate Ortho Reflex Foam Support Orthopaedic Rolled Extra Firm Mattress

    Soft
    Medium
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    was_price_is_VISCO_ULTIMATE_ORTHO_MATTRESS.5916|0.00
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    RRP From £264.99 Now From £144.99
  24. 42% OFF
    March Sale
    1
    Maestro Spring Memory Foam Tufted Mattress

    Soft
    Medium
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    was_price_is_HAPPY_BEDS_MEMORY_MAESTRO_MEMO.5198|0.00
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    RRP From £239.99 Now From £139.99

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How Big is a King Size Mattress?

A king mattress measures 150cm x 200cm, or 5.0ft x 6.6ft.

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.

Which is the Best King Mattress?

We want to make buying a new mattress as simple as possible, so each of our products come with customer star and firmness ratings. The more stars a king size mattress has, the better it has been rated by those who have bought and tried it.

If you’re not sure on which primary filling will suit you best, whether you need some of the special features, or which depth will fit your bed, please take a look at our Mattress Buying Guide and our Measuring Guide.

Need Even More Space?

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.