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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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Signature Crystal 3000 Pocket Sprung Orthopaedic Natural Mattress
Medium-Firm
4.8 star review
4.8
(418)
Signature Crystal 3000 Pocket Sprung Orthopaedic Natural Mattress
From£379.99 You Save: £115 Now From £264.99 You Save: £115
10% Off CODE: EXTRA10
Super Ortho Spring Reflex Foam Orthopaedic Firm Mattress
Firm
4.8 star review
4.8
(440)
Super Ortho Spring Reflex Foam Orthopaedic Firm Mattress
From£219.99 You Save: £55 Now From £164.99 You Save: £55
10% Off CODE: EXTRA10
Laytech Fresh Latex and Recon Foam Orthopaedic Mattress
Medium
New Arrival
Laytech Fresh Latex and Recon Foam Orthopaedic Mattress
From£259.99 You Save: £80 Now From £179.99 You Save: £80
5 Year Guarantee
Star Memory and Encap Foam Spring Orthopaedic Mattress
Medium
5 star review
5.0
(4)
Star Memory and Encap Foam Spring Orthopaedic Mattress
From£242.98 You Save: £108 Now From £134.99 You Save: £108
5 Year Guarantee
Spring Flexi Recon Foam Orthopaedic Mattress
Medium
3.8 star review
3.8
(5)
Spring Flexi Recon Foam Orthopaedic Mattress
From£215.98 You Save: £96 Now From £119.99 You Save: £96
5 Year Guarantee
Impressions Cool Blue 1000 Pocket Foam Ortho Mattress
Medium
New Arrival
Impressions Cool Blue 1000 Pocket Foam Ortho Mattress
From£434.99 You Save: £145 Now From £289.99 You Save: £145
5 Year Guarantee
Impressions Cool Indigo Memory Foam Orthopaedic Mattress
Medium-Firm
New Arrival
Impressions Cool Indigo Memory Foam Orthopaedic Mattress
From£620.98 You Save: £276 Now From £344.99 You Save: £276
5 Year Guarantee
Pocket Memory Foam 2000 Individual Sprung Orthopaedic Mattress
Medium-Firm
4.9 star review
4.9
(23)
Pocket Memory Foam 2000 Individual Sprung Orthopaedic Mattress
From£269.99 You Save: £85 Now From £184.99 You Save: £85
5 Year Guarantee
Pocket Memory Foam 1000 Individual Sprung Orthopaedic Mattress
Medium-Firm
4.6 star review
4.6
(5)
Pocket Memory Foam 1000 Individual Sprung Orthopaedic Mattress
From£249.99 You Save: £75 Now From £174.99 You Save: £75
5 Year Guarantee
Laytech Luxury Latex and Reflex Foam Orthopaedic Mattress
Medium
4.8 star review
4.8
(5)
Laytech Luxury Latex and Reflex Foam Orthopaedic Mattress
From£422.98 You Save: £188 Now From £234.99 You Save: £188
5 Year Guarantee
Laytech Plus Latex and Reflex Foam Orthopaedic Mattress
Medium
4.4 star review
4.4
(5)
Laytech Plus Latex and Reflex Foam Orthopaedic Mattress
From£314.98 You Save: £140 Now From £174.99 You Save: £140
5 Year Guarantee
Pocket Comfort 3000 Sprung Foam Support Ortho Rolled Mattress
Medium-Firm
4.9 star review
4.9
(32)
Pocket Comfort 3000 Sprung Foam Support Ortho Rolled Mattress
From£350.98 You Save: £156 Now From £194.99 You Save: £156
5 Year Guarantee
Pocket Memory Foam 3000 Individual Sprung Orthopaedic Rolled Mattress
Medium-Firm
4.8 star review
4.8
(17)
Pocket Memory Foam 3000 Individual Sprung Orthopaedic Rolled Mattress
From£324.99 You Save: £105 Now From £219.99 You Save: £105
5 Year Guarantee
Ultimate Ortho Reflex Foam Support Orthopaedic Rolled Firm Mattress
Medium-Firm
4.4 star review
4.4
(58)
Ultimate Ortho Reflex Foam Support Orthopaedic Rolled Firm Mattress
From£323.98 You Save: £144 Now From £179.99 You Save: £144
5 Year Guarantee
Fusion Extra Plus Memory and Recon Foam Orthopaedic Mattress
Medium
4.6 star review
4.6
(11)
Fusion Extra Plus Memory and Recon Foam Orthopaedic Mattress
From£260.98 You Save: £116 Now From £144.99 You Save: £116
5 Year Guarantee
Fusion Super Memory and Recon Foam Orthopaedic Mattress
Medium-Firm
4.9 star review
4.9
(9)
Fusion Super Memory and Recon Foam Orthopaedic Mattress
From£287.98 You Save: £128 Now From £159.99 You Save: £128
5 Year Guarantee
Fusion Ultra Memory and Recon Foam Orthopaedic Mattress
Medium-Firm
4.9 star review
4.9
(8)
Fusion Ultra Memory and Recon Foam Orthopaedic Mattress
From£368.98 You Save: £164 Now From £204.99 You Save: £164
5 Year Guarantee
Fresh Wave Memory and Reflex Foam Orthopaedic Mattress
Medium
5 star review
5.0
(2)
Fresh Wave Memory and Reflex Foam Orthopaedic Mattress
From£323.98 You Save: £144 Now From £179.99 You Save: £144
5 Year Guarantee
Ocean Wave Memory and Recon Foam Orthopaedic Mattress
Medium
5 star review
5.0
(1)
Ocean Wave Memory and Recon Foam Orthopaedic Mattress
From£404.98 You Save: £180 Now From £224.99 You Save: £180
5 Year Guarantee
Pocket Bounce 2000 Sprung Foam Support Ortho Rolled Mattress
Medium-Firm
5 star review
5.0
(5)
Pocket Bounce 2000 Sprung Foam Support Ortho Rolled Mattress
From£287.98 You Save: £128 Now From £159.99 You Save: £128
5 Year Guarantee
Pocket Ortho 4000 Sprung Recon Foam Support Ortho Rolled Mattress
Medium-Firm
4.8 star review
4.8
(6)
Pocket Ortho 4000 Sprung Recon Foam Support Ortho Rolled Mattress
From£368.98 You Save: £164 Now From £204.99 You Save: £164
5 Year Guarantee
Star Flexi Spring Recon Foam Orthopaedic Mattress
Medium
New Arrival
Star Flexi Spring Recon Foam Orthopaedic Mattress
From£215.98 You Save: £96 Now From £119.99 You Save: £96
5 Year Guarantee
Deluxe Semi Orthopaedic Sprung Mattress
Medium-Firm
3 star review
3.0
(1)
Deluxe Semi Orthopaedic Sprung Mattress
From£209.99 You Save: £60 Now From £149.99 You Save: £60
5 Year Guarantee
Premier Sprung Mattress
Soft
5 star review
5.0
(1)
Premier Sprung Mattress
From£159.99 You Save: £40 Now From £119.99 You Save: £40
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.