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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.

Items 49-72 of 96

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  1. 45% OFF
    April Sale
    Pocket Memory Foam 2000 Individual Sprung Reflex Support Orthopaedic Mattress
    Pocket Memory Foam 2000 Individual Sprung Reflex Support Orthopaedic Mattress

    Soft
    Medium
    Firm
    was_price_is_HAPPY_BEDS_POCKET_MEMORY_2000_.9733|0.00
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    RRP From £299.99 Now From £164.99
  2. 44% OFF
    April Sale
    Sleep Soul Balance 800 Pocket Spring and Memory Foam Mattress
    Sleep Soul Balance 800 Pocket Spring and Memory Foam Mattress

    Soft
    Medium
    Firm
    was_price_is_BRL_SLEEPSOUL_BALANCE_800_POCK.9173|0.00
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    RRP From £314.99 Now From £174.99
  3. 44% OFF
    April Sale
    Pocket Bounce 2000 Individual Sprung Reflex Foam Support Orthopaedic Rolled Mattress
    Pocket Bounce 2000 Individual Sprung Reflex Foam Support Orthopaedic Rolled Mattress

    Soft
    Medium
    Firm
    was_price_is_POCKET_BOUNCE_2000_MATTRESS__V.2744|0.00
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    RRP From £269.99 Now From £149.99
  4. 45% OFF
    April Sale
    1
    Milk Vitality 2000 Pocket Sprung Memory, Latex and Reflex Foam Mattress

    Soft
    Medium
    Firm
    was_price_is_HAPPY_BEDS_MILK_VITALITY_2000_.2307|0.00
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    RRP From £459.99 Now From £254.99
  5. 45% OFF
    April Sale
    Fusion Super Memory and Reflex Foam Orthopaedic Mattress
    Fusion Super Memory and Reflex Foam Orthopaedic Mattress

    Soft
    Medium
    Firm
    was_price_is_FUSION_SUPER_PLUS_MEMORY_AND_R.5521|0.00
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    RRP From £279.99 Now From £154.99
  6. 45% OFF
    April Sale
    Spring Memory and Reflex Foam Orthopaedic Mattress
    Spring Memory and Reflex Foam Orthopaedic Mattress

    Soft
    Medium
    Firm
    was_price_is_HAPPY_BEDS_SPRING_MEMORY_FOAM_.2120|0.00
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    RRP From £264.99 Now From £144.99
  7. 45% OFF
    April Sale
    Luna 3000 Pocket Sprung Mattress
    Luna 3000 Pocket Sprung Mattress

    Soft
    Medium
    Firm
    was_price_is_HAPPY_BEDS_LUNA_3000_POCKET_SP.7561|0.00
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    RRP From £504.99 Now From £279.99
  8. 45% OFF
    April Sale
    Pocket Memory Foam 4000 Individual Sprung Orthopaedic Mattress
    Pocket Memory Foam 4000 Individual Sprung Orthopaedic Mattress

    Soft
    Medium
    Firm
    was_price_is_VISCO_MEMORY_POCKET_4000_MATTR.3355|0.00
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    RRP From £389.99 Now From £214.99
  9. 45% OFF
    April Sale
    Fusion Ultra Memory and Reflex Foam Orthopaedic Mattress
    Fusion Ultra Memory and Reflex Foam Orthopaedic Mattress

    Soft
    Medium
    Firm
    was_price_is_FUSION_ULTRA_PLUS_MEMORY_AND_R.8394|0.00
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    RRP From £354.99 Now From £194.99
  10. 46% OFF
    April Sale
    1
    Soft Feel 5000 Memory Foam Orthopaedic Mattress Topper
    was_price_is_HAPPY_BEDS_TOPPER_5000_MATTRES.3784|0.00
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    RRP From £174.99 Now From £94.99
  11. 45% OFF
    April Sale
    Star Flexi Spring Reflex Foam Orthopaedic Mattress
    Star Flexi Spring Reflex Foam Orthopaedic Mattress

    Soft
    Medium
    Firm
    was_price_is_STAR_FLEXI_SPRING_REFLEX_FOAM_.917|0.00
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    RRP From £199.99 Now From £109.99
  12. 44% OFF
    April Sale
    Calming 3000 Pocket Sprung Mattress
    Calming 3000 Pocket Sprung Mattress

    Soft
    Medium
    Firm
    was_price_is_CALMING_3000_MATTRESS.1415|0.00
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    RRP From £359.99 Now From £199.99
  13. 44% OFF
    April Sale
    1
    Jewel 2000 Pocket Sprung Orthopaedic Natural Fillings Mattress

    Soft
    Medium
    Firm
    was_price_is_HAPPY_BEDS_JEWEL_2000_POCKET_S.5101|0.00
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    RRP From £404.99 Now From £224.99
  14. 45% OFF
    April Sale
    Impressions 6000 Cool Blue Memory and Reflex Foam Orthopaedic Mattress
    Impressions 6000 Cool Blue Memory and Reflex Foam Orthopaedic Mattress

    Soft
    Medium
    Firm
    was_price_is_HAPPY_BEDS_IMPRESSIONS_6000_CO.9936|0.00
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    RRP From £309.99 Now From £169.99
  15. 45% OFF
    April Sale
    Sleep Soul Comfort 800 Pocket Spring Mattress
    Sleep Soul Comfort 800 Pocket Spring Mattress

    Soft
    Medium
    Firm
    was_price_is_BRL_SLEEPSOUL_COMFORT_800_POCK.7114|0.00
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    RRP From £299.99 Now From £164.99
  16. 21% OFF
    April Sale
    Jay-Be Benchmark S1 Comfort Foam Free Spring Mattress
    Jay-Be Benchmark S1 Comfort Foam Free Spring Mattress

    Soft
    Medium
    Firm
    was_price_is_JYBO-BNCHMK-S1COMF-MATT-PRNT|0.00
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    RRP From £189.99 Now From £149.99
  17. 45% OFF
    April Sale
    Pocket Memory Foam 1000 Individual Sprung Reflex Support Orthopaedic Mattress
    Pocket Memory Foam 1000 Individual Sprung Reflex Support Orthopaedic Mattress

    Soft
    Medium
    Firm
    was_price_is_HAPPY_BEDS_POCKET_MEMORY_1000_.7564|0.00
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    RRP From £279.99 Now From £154.99
  18. 42% OFF
    April Sale
    1
    Pearl Contour Spring Memory Foam Tufted Mattress

    Soft
    Medium
    Firm
    was_price_is_HAPPY_BEDS_PEARL_CONTOUR_MEMOR.7856|0.00
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    RRP From £249.99 Now From £144.99
  19. 44% OFF
    April Sale
    Anniversary Backcare 2000 Pocket Sprung Mattress
    Anniversary Backcare 2000 Pocket Sprung Mattress

    Soft
    Medium
    Firm
    was_price_is_HAPPY_BEDS_ANNIVERSARY_BACKCAR.9060|0.00
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    RRP From £359.99 Now From £199.99
  20. 45% OFF
    April Sale
    Spring Flexi Reflex Foam Orthopaedic Mattress
    Spring Flexi Reflex Foam Orthopaedic Mattress

    Soft
    Medium
    Firm
    was_price_is_HAPPY_BEDS_SPRING_FLEXI_REFLEX.7578|0.00
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    RRP From £199.99 Now From £109.99
  21. 20% OFF
    April Sale
    Jay-Be Benchmark S5 Hybrid Pocket Spring Mattress
    Jay-Be Benchmark S5 Hybrid Pocket Spring Mattress

    Soft
    Medium
    Firm
    was_price_is_JYBO-BNCHMK-S5HYBRD-MATT-PRNT|0.00
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    RRP From £249.99 Now From £199.99
  22. 45% OFF
    April Sale
    1
    Bamboo 1500 Pocket Sprung Memory and Reflex Foam Mattress

    Soft
    Medium
    Firm
    was_price_is_HAPPY_BEDS_BAMBOO_POCKET_1500_.1032|0.00
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    RRP From £354.99 Now From £194.99
  23. 48% OFF
    April Sale
    1
    Amethyst Crystal 2500 Pocket Sprung Air Stream Pillow Top Mattress

    Soft
    Medium
    Firm
    was_price_is_HAPPY_BEDS_AMETIST_CRYSTAL_250.289|0.00
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    RRP From £799.99 Now From £419.99
  24. 45% OFF
    April Sale
    1
    Soft Feel 7500 Memory Foam Orthopaedic Mattress Topper
    was_price_is_HAPPY_BEDS_TOPPER_7500_MATTRES.2919|0.00
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    RRP From £209.99 Now From £114.99

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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.