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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
    April Sale
    Imperial 3500 Pocket Sprung Mattress
    Imperial 3500 Pocket Sprung Mattress

    Soft
    Medium
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    was_price_is_IMPERIAL_WHITE_3500_MATTRESS.875|0.00
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    RRP From £354.99 Now From £194.99
  2. 45% OFF
    April Sale
    Pocket Flexi 1000 Individual Sprung Reflex Foam Orthopaedic Mattress
    Pocket Flexi 1000 Individual Sprung Reflex Foam Orthopaedic Mattress

    Soft
    Medium
    Firm
    was_price_is_HAPPY_BEDS_FLEXI_1000_POCKET_S.660|0.00
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    RRP From £264.99 Now From £144.99
  3. 45% OFF
    April Sale
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    Aloe Vera 1500 Pocket Sprung Memory and Reflex Foam Mattress

    Soft
    Medium
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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
  4. 49% OFF
    April Sale
    1
    Bamboo Vitality 2000 Pocket Sprung Memory and Reflex Foam Mattress

    Soft
    Medium
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    was_price_is_HAPPY_BEDS_BAMBOO_VITALITY_200.8787|0.00
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    RRP From £459.99 Now From £234.99
  5. 45% OFF
    April Sale
    Flex 1000 Reflex Foam Orthopaedic Mattress
    Flex 1000 Reflex Foam Orthopaedic Mattress

    Soft
    Medium
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    was_price_is_HAPPY_BEDS_F1000_REFLEX_FOAM_M.9669|0.00
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    RRP From £189.99 Now From £104.99
  6. 48% OFF
    April Sale
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    Signature Silver 1400 Pocket Sprung Orthopaedic Natural Fillings Mattress

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    was_price_is_HAPPY_BEDS_SIGNATURE_SILVER_14.9698|0.00
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    RRP From £344.99 Now From £179.99
  7. 42% OFF
    April Sale
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    Mirage Spring Quilted Bamboo Fabric Natural Fillings Mattress

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    Medium
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    was_price_is_HAPPY_BEDS_MIRAGE_NATURAL_WOOL.3924|0.00
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    RRP From £224.99 Now From £129.99
  8. 45% OFF
    April 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
  9. 48% OFF
    April Sale
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    Star Spring Quilted Fabric Mattress

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    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
  10. 42% OFF
    April Sale
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    Clifton Royale 1000 Pocket Sprung Orthopaedic Mattress

    Soft
    Medium
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    was_price_is_HAPPY_BEDS_CLIFTON_ROYALE_1000.3717|0.00
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    RRP From £264.99 Now From £154.99
  11. 44% OFF
    April Sale
    Richmond 3000 Pocket Sprung Natural Fillings Mattress
    Richmond 3000 Pocket Sprung Natural Fillings Mattress

    Soft
    Medium
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    was_price_is_HAPPY_BEDS_RICHMOND_3000_POCKE.9570|0.00
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    RRP From £404.99 Now From £224.99
  12. 48% OFF
    April Sale
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    Anti-Bed Bug 1500 Pocket Sprung Memory, Latex and Reflex Foam Pillow Top Mattress

    Soft
    Medium
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    was_price_is_HAPPY_BEDS_ANTI_BED_BUG_PILLOW.2765|0.00
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    RRP From £554.99 Now From £289.99
  13. 48% OFF
    April Sale
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    Windsor 3000 Pocket Sprung Orthopaedic Pillow Top Mattress

    Soft
    Medium
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    was_price_is_HAPPY_BEDS_WINDSOR_3000_PILLOW.7771|0.00
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    RRP From £819.99 Now From £429.99
  14. 45% OFF
    April Sale
    Ortho Sleep 1500 Reflex Foam Orthopaedic Mattress
    Ortho Sleep 1500 Reflex Foam Orthopaedic Mattress

    Soft
    Medium
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    was_price_is_ORTHO_SLEEP_1500_REFLEX_FOAM_O.2969|0.00
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    RRP From £209.99 Now From £114.99
  15. 48% OFF
    April Sale
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    Ambassador 3000 Pocket Sprung Orthopaedic Natural Fillings Mattress

    Soft
    Medium
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    was_price_is_HAPPY_BEDS_AMBASSADOR_3000_ORT.4096|0.00
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    RRP From £639.99 Now From £334.99
  16. 42% OFF
    April Sale
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    Eclipse Pocket Sprung 800 Quilted Fabric Mattress

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    Medium
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    was_price_is_HAPPY_BEDS_POCKET_ECLIPSE_POCK.7580|0.00
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    RRP From £214.99 Now From £124.99
  17. 43% OFF
    April Sale
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    Premier Spring Quilted Fabric Mattress

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    Medium
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    was_price_is_HAPPY_BEDS_PREMIER_TRADITIONAL.2928|0.00
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    RRP From £139.99 Now From £79.99
  18. 45% OFF
    April Sale
    Sleep Soul Bliss 800 Pocket Spring and Memory Foam Pillowtop Mattress
    Sleep Soul Bliss 800 Pocket Spring and Memory Foam Pillowtop Mattress

    Soft
    Medium
    Firm
    was_price_is_BRL_SLEEPSOUL_BLISS_800_POCKET.5194|0.00
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    RRP From £424.99 Now From £234.99
  19. 42% OFF
    April Sale
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    Gold Tufted Orthopaedic Spring Mattress

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    was_price_is_HAPPY_BEDS_GOLD_TUFTED_ORTHOPA.2231|0.00
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    RRP From £164.99 Now From £94.99
  20. 44% OFF
    April Sale
    Lavender 3000 Pocket Sprung Memory Foam Mattress
    Lavender 3000 Pocket Sprung Memory Foam Mattress

    Soft
    Medium
    Firm
    was_price_is_HAPPY_BEDS_LAVENDER_3000_POCKE.6130|0.00
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    RRP From £359.99 Now From £199.99
  21. 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
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    was_price_is_BRL_SLEEPSOUL_BALANCE_800_POCK.9173|0.00
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    RRP From £314.99 Now From £174.99
  22. 45% OFF
    April Sale
    1
    Milk Vitality 2000 Pocket Sprung Memory, Latex and Reflex Foam Mattress

    Soft
    Medium
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    was_price_is_HAPPY_BEDS_MILK_VITALITY_2000_.2307|0.00
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    RRP From £459.99 Now From £254.99
  23. 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
  24. 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

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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.