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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
    January Sale
    1
    Super Ortho Spring Reflex Foam Orthopaedic Medium Firm Mattress

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    was_price_is_HAPPY_BEDS_SUPER_ORTHO_FIRM_OR.3709|0.00
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    RRP From £204.99 Now From £119.99
  2. 55% OFF
    January Sale
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    Signature Crystal 3000 Pocket Sprung Orthopaedic Natural Fillings Mattress

    Soft
    Medium
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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
    January 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. 45% OFF
    January Sale
    Touch 3-Zone Memory Foam Orthopaedic Rolled Mattress
    Touch 3-Zone Memory Foam Orthopaedic Rolled Mattress

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    Medium
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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
  5. 45% OFF
    January 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
  6. 51% OFF
    January Sale
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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
  7. 43% OFF
    January Sale
    1
    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
  8. 45% OFF
    January Sale
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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
  9. 41% OFF
    January Sale
    1
    Pinerest Spring Semi-Orthopaedic Quilted Fabric Mattress

    Soft
    Medium
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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
  10. 42% OFF
    January Sale
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    Majestic 1000 Pocket Sprung Orthopaedic Mattress

    Soft
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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
  11. 44% OFF
    January 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

    Soft
    Medium
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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
  12. 45% OFF
    January Sale
    1
    Cashmere 3000 Pocket Sprung Memory Foam Mattress

    Soft
    Medium
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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
  13. 51% OFF
    January Sale
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    Signature Platinum 2000 Pocket Sprung Orthopaedic Natural Fillings Mattress

    Soft
    Medium
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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
  14. 42% OFF
    January Sale
    1
    Memflex Spring Memory and Reflex Foam Orthopaedic Mattress

    Soft
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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
  15. 47% OFF
    January Sale
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    Signature Gold 1800 Pocket Sprung Orthopaedic Natural Fillings Mattress

    Soft
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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
  16. 45% OFF
    January 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
  17. 44% OFF
    January Sale
    Comfort Ortho 1400 Pocket Sprung Mattress
    Comfort Ortho 1400 Pocket Sprung Mattress

    Soft
    Medium
    Firm
    was_price_is_HAPPY_BEDS_COMFORT_ORTHO_1400_.8341|0.00
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    RRP From £314.99 Now From £174.99
  18. 45% OFF
    January 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
  19. 45% OFF
    January Sale
    1
    Aloe Vera 1500 Pocket Sprung Memory and Reflex Foam Mattress

    Soft
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    was_price_is_HAPPY_BEDS_ALOE_VERA_MEMORY_FO.3075|0.00
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    RRP From £354.99 Now From £194.99
  20. 42% OFF
    January Sale
    Membound Memory Foam Spring Mattress
    Membound Memory Foam Spring Mattress

    Soft
    Medium
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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
  21. 45% OFF
    January Sale
    Deluxe Reflex Spring Rolled Mattress
    Deluxe Reflex Spring Rolled Mattress

    Soft
    Medium
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    was_price_is_DELUXE_REFLEX_SPRING_ROLLED_MA.4227|0.00
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    RRP From £154.99 Now From £84.99
  22. 48% OFF
    January Sale
    1
    Star Spring Quilted Fabric Mattress

    Soft
    Medium
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    was_price_is_HAPPY_BEDS_STAR_TRADITIONAL_BO.8592|0.00
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    RRP From £154.99 Now From £79.99
  23. 45% OFF
    January Sale
    Fusion Extra Plus Memory and Reflex Foam Orthopaedic Mattress
    Fusion Extra Plus Memory and Reflex Foam Orthopaedic Mattress

    Soft
    Medium
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    was_price_is_FUSION_EXTRA_PLUS_MEMORY_AND_R.9782|0.00
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    RRP From £244.99 Now From £134.99
  24. 43% OFF
    January Sale
    1
    Premier Spring Quilted Fabric Mattress

    Soft
    Medium
    Firm
    was_price_is_HAPPY_BEDS_PREMIER_TRADITIONAL.2928|0.00
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    RRP From £139.99 Now From £79.99

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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.