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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 mattress if you’ve got the space to play with? You’ll sleep better at night and be free to toss and turn without disturbing your partner’s sleep.

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Balmoral 3500 Pocket Sprung Memory Foam Mattress
Medium
4.8 star review
4.8
(117)
Balmoral 3500 Pocket Sprung Memory Foam Mattress
From£344.99 You Save: £100 Now From £244.99 You Save: £100
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Richmond 3000 Pocket Sprung Natural Fillings Mattress
Medium-Firm
4.9 star review
4.9
(62)
Richmond 3000 Pocket Sprung Natural Fillings Mattress
From£394.99 You Save: £120 Now From £274.99 You Save: £120
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Comfort Ortho 1400 Pocket Sprung Mattress
Soft-Medium
4.8 star review
4.8
(53)
Comfort Ortho 1400 Pocket Sprung Mattress
From£314.99 You Save: £90 Now From £224.99 You Save: £90
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Lavender 3000 Pocket Sprung Memory Foam Mattress
Medium-Firm
4.9 star review
4.9
(39)
Lavender 3000 Pocket Sprung Memory Foam Mattress
From£359.99 You Save: £110 Now From £249.99 You Save: £110
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Deluxe Reflex Spring Rolled Mattress
Medium
4.4 star review
4.4
(43)
Deluxe Reflex Spring Rolled Mattress
From£144.99 You Save: £35 Now From £109.99 You Save: £35
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Deluxe Memory Foam Spring Rolled Mattress
Medium
4.6 star review
4.6
(166)
Deluxe Memory Foam Spring Rolled Mattress
From£164.99 You Save: £40 Now From £124.99 You Save: £40
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Spring Memory and Encap Foam Orthopaedic Mattress
Medium
4.6 star review
4.6
(8)
Spring Memory and Encap Foam Orthopaedic Mattress
From£234.99 You Save: £70 Now From £164.99 You Save: £70
Festive Daily Deal
Ortho Sleep 1500 Reflex Foam Orthopaedic Mattress
Firm
4.9 star review
4.9
(16)
Ortho Sleep 1500 Reflex Foam Orthopaedic Mattress
From£204.99 You Save: £55 Now From £149.99 You Save: £55
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Little Champ 800 Pocket Sprung Reflex Foam Orthopaedic Mattress
Medium
4.7 star review
4.7
(13)
Little Champ 800 Pocket Sprung Reflex Foam Orthopaedic Mattress
From£219.99 You Save: £60 Now From £159.99 You Save: £60
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Ocean Gel Memory and Reflex Foam Cool Orthopaedic LayGel Mattress
Medium
4.9 star review
4.9
(115)
Ocean Gel Memory and Reflex Foam Cool Orthopaedic LayGel Mattress
From£264.99 You Save: £75 Now From £189.99 You Save: £75
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Pocket Flexi 1000 Individual Sprung Recon Foam Orthopaedic Mattress
Medium
4.7 star review
4.7
(65)
Pocket Flexi 1000 Individual Sprung Recon Foam Orthopaedic Mattress
From£249.99 You Save: £70 Now From £179.99 You Save: £70
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Ocean Gel Pocket 2000 Foam Sprung Cool Ortho LayGel Mattress
Medium-Firm
4.8 star review
4.8
(70)
Ocean Gel Pocket 2000 Foam Sprung Cool Ortho LayGel Mattress
From£264.99 You Save: £75 Now From £189.99 You Save: £75
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SleepSoul Harmony Memory Foam Pocket Spring Mattress
Medium
2.5 star review
2.5
(2)
SleepSoul Harmony Memory Foam Pocket Spring Mattress
From£344.99 You Save: £110 Now From £234.99 You Save: £110
5 Year Guarantee
Capsule Pillowtop 3000 Pocket Sprung and Memory Foam Mattress
Medium
New Arrival
Capsule Pillowtop 3000 Pocket Sprung and Memory Foam Mattress
From£1279.99 You Save: £450 Now From £829.99 You Save: £450
5 Year Guarantee
Soft Feel 2500 Memory Foam Orthopaedic Mattress Topper
4.8 star review
4.8
(4)
Soft Feel 2500 Memory Foam Orthopaedic Mattress Topper
From£114.99 You Save: £25 Now From £89.99 You Save: £25
5 Year Guarantee
Soft Feel 5000 Memory Foam Orthopaedic Mattress Topper
4.9 star review
4.9
(23)
Soft Feel 5000 Memory Foam Orthopaedic Mattress Topper
From£149.99 You Save: £40 Now From £109.99 You Save: £40
5 Year Guarantee
Soft Feel 7500 Memory Foam Orthopaedic Mattress Topper
4.8 star review
4.8
(5)
Soft Feel 7500 Memory Foam Orthopaedic Mattress Topper
From£189.99 You Save: £55 Now From £134.99 You Save: £55
5 Year Guarantee

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Sleep like royalty on a king size mattress

While the king size mattress may not be the biggest mattress on the market, with that honour belonging to super king mattresses, they will surely delight those who love extra room while they sleep. Our king size mattresses are expertly crafted to ensure you stay comfortable all night. Say goodbye to restless nights - with a king size mattress in your room; you'll surely get the best sleep of your life. Find the king size mattress that best suits your needs with Happy Beds.

Explore king mattresses available in a variety of materials

Finding the perfect king size mattress for your body and sleep style can be challenging. Luckily, we offer various types of mattresses so that you can find the one that best fits you. Looking for something that will mould to your body's contours? Try a king size memory foam mattress. Or, if you prefer a mattress made with all-natural materials, try a natural filling king size mattress filled with materials such as cotton and wool. No matter what you are looking for in a mattress, we will surely have an option that suits you perfectly.

What size is a king size mattress?

A king size mattress measures 5ft x 6.6ft, or 150cm x 200cm. So, whether you're a couple who wants extra space at night or just a solo sleeper wanting to sleep like royalty, a king mattress is guaranteed to do the job. Not sure if a king mattress is the right size for you? Check out our mattress size guide for more information.

What types of king size mattresses are available?

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

King size memory foam mattresses

If you're looking for the ultimate support, then a king size memory foam mattress is the perfect choice. Memory foam uses your body heat to mould your contours for sleep, which is customised to your needs!

King size pocket sprung mattresses

A king size pocket sprung mattress is great for couples, consisting of thousands of individually wrapped pocket springs that operate independently. This means that even if you or your partner move around a lot at night, any movement will be isolated to prevent jostling!

King size open coil spring mattresses

Also called traditional mattress or Bonnell coil, a king size open coil mattress has a structure comprising a series of interconnecting springs. This spreads the weight evenly across the surface, giving you high support at an affordable price!

King size latex foam mattresses

Latex foam works similarly to memory foam in that it uses your body heat to mould to your body, but it has the additional benefit of being hypoallergenic. Our king size latex foam mattresses are perfect for those suffering from allergies, as latex foam is naturally hypoallergenic!

King size orthopaedic mattresses

If you suffer from a bad back or have stiff and achy joints, you might consider investing in a king size orthopaedic mattress. These mattresses are designed to be firmer than other mattresses, helping to promote a healthy spinal alignment to alleviate aches and pains.

What firmness levels do king size mattresses come in?

Our king size mattresses come in the following firmness ratings:

  • Soft king size mattresses
  • Soft/medium king size mattresses
  • Medium king size mattresses
  • Medium/firm king size mattresses
  • Firm king size mattresses

The firmness rating of your mattress is incredibly important when it comes to how restful your sleep is and, in turn, how healthy your day is. Choosing the wrong firmness can lead to aches, pains, and sleep loss! Deciding on the right mattress firmness can be impacted by personal preference, any long-lasting injuries, weight, and sleeping position!

Find out more about mattress firmness in our mattress buying guide.