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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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Super Ortho Spring Reflex Foam Orthopaedic Medium Firm Mattress
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Super Ortho Spring Reflex Foam Orthopaedic Medium Firm Mattress
£214.99 You Save: £55 Now From £159.99
Super Ortho Spring Reflex Foam Orthopaedic Medium Firm Mattress
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Signature Crystal 3000 Pocket Sprung Orthopaedic Natural Mattress
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Signature Crystal 3000 Pocket Sprung Orthopaedic Natural Mattress
£374.99 You Save: £115 Now From £259.99
Signature Crystal 3000 Pocket Sprung Orthopaedic Natural Mattress
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Supreme Ortho Spring Reflex Foam Orthopaedic Extra Firm Mattress
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Supreme Ortho Spring Reflex Foam Orthopaedic Extra Firm Mattress
£219.99 You Save: £60 Now From £159.99
Supreme Ortho Spring Reflex Foam Orthopaedic Extra Firm Mattress
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Deluxe Memory Foam Spring Rolled Mattress
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Deluxe Memory Foam Spring Rolled Mattress
£164.99 You Save: £40 Now From £124.99
Deluxe Memory Foam Spring Rolled Mattress
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Ortho Royale Spring Orthopaedic Mattress
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Ortho Royale Spring Orthopaedic Mattress
£204.99 You Save: £55 Now From £149.99
Ortho Royale Spring Orthopaedic Mattress
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Majestic 1000 Pocket Sprung Orthopaedic Mattress
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Majestic 1000 Pocket Sprung Orthopaedic Mattress
£249.99 You Save: £70 Now From £179.99
Majestic 1000 Pocket Sprung Orthopaedic Mattress
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Signature Gold 1800 Pocket Sprung Orthopaedic Natural Mattress
£309.99 You Save: £95 Now From £214.99
Signature Gold 1800 Pocket Sprung Orthopaedic Natural Mattress
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Ultimate Ortho Recon Foam Support Orthopaedic Rolled Firm Mattress
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Ultimate Ortho Recon Foam Support Orthopaedic Rolled Firm Mattress
£323.98 You Save: £144 Now From £179.99
Ultimate Ortho Recon Foam Support Orthopaedic Rolled Firm Mattress
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Cashmere 3000 Pocket Sprung Memory Foam Mattress
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Cashmere 3000 Pocket Sprung Memory Foam Mattress
£339.99 You Save: £100 Now From £239.99
Cashmere 3000 Pocket Sprung Memory Foam Mattress
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Touch 3-Zone Memory Foam Orthopaedic Rolled Mattress
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Touch 3-Zone Memory Foam Orthopaedic Rolled Mattress
£204.99 You Save: £55 Now From £149.99
Touch 3-Zone Memory Foam Orthopaedic Rolled Mattress
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Membound Memory Foam Spring Mattress
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Membound Memory Foam Spring Mattress
£204.99 You Save: £55 Now From £149.99
Membound Memory Foam Spring Mattress
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Signature Platinum 2000 Pocket Sprung Orthopaedic Natural Mattress
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Signature Platinum 2000 Pocket Sprung Orthopaedic Natural Mattress
£339.99 You Save: £100 Now From £239.99
Signature Platinum 2000 Pocket Sprung Orthopaedic Natural Mattress
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Premier Sprung Mattress
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Premier Sprung Mattress
£149.99 You Save: £40 Now From £109.99
Premier Sprung Mattress
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Eclipse Pocket Sprung 800 Quilted Fabric Mattress
£224.99 You Save: £60 Now From £164.99
Eclipse Pocket Sprung 800 Quilted Fabric Mattress
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Gold Tufted Orthopaedic Spring Mattress
£164.99 You Save: £40 Now From £124.99
Gold Tufted Orthopaedic Spring Mattress
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Maestro Spring Memory Foam Tufted Mattress
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Maestro Spring Memory Foam Tufted Mattress
£244.99 You Save: £70 Now From £174.99
Maestro Spring Memory Foam Tufted Mattress
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Signature 2000 Pocket Sprung Pillow Top Natural Fillings Mattress
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Signature 2000 Pocket Sprung Pillow Top Natural Fillings Mattress
£404.99 You Save: £125 Now From £279.99
Signature 2000 Pocket Sprung Pillow Top Natural Fillings Mattress
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Flex 1000 Recon Foam Orthopaedic Mattress
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Flex 1000 Recon Foam Orthopaedic Mattress
£179.99 You Save: £45 Now From £134.99
Flex 1000 Recon Foam Orthopaedic Mattress
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Premier Spring Quilted Fabric Mattress
£159.99 You Save: £40 Now From £119.99
Premier Spring Quilted Fabric Mattress
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SleepSoul Space 2000 Pocket Spring Pillowtop Mattress
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SleepSoul Space 2000 Pocket Spring Pillowtop Mattress
£449.99 You Save: £150 Now From £299.99
SleepSoul Space 2000 Pocket Spring Pillowtop Mattress
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Anniversary Backcare 2000 Pocket Sprung Mattress
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Anniversary Backcare 2000 Pocket Sprung Mattress
£324.99 You Save: £105 Now From £219.99
Anniversary Backcare 2000 Pocket Sprung Mattress
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Balmoral 3500 Pocket Sprung Memory Foam Mattress
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Balmoral 3500 Pocket Sprung Memory Foam Mattress
£339.99 You Save: £100 Now From £239.99
Balmoral 3500 Pocket Sprung Memory Foam Mattress
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Touch 7-Zone Memory Foam Orthopaedic Rolled Mattress
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Touch 7-Zone Memory Foam Orthopaedic Rolled Mattress
£219.99 You Save: £60 Now From £159.99
Touch 7-Zone Memory Foam Orthopaedic Rolled Mattress
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Bamboo Vitality 2000 Pocket Sprung Memory and Reflex Foam Mattress
£394.99 You Save: £130 Now From £264.99
Bamboo Vitality 2000 Pocket Sprung Memory and Reflex Foam Mattress

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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.

How big is a king size mattress?

A king mattress offers the ultimate luxury and space, measuring 150cm x 200cm, or 5.0ft x 6.6ft. Whether you're a couple who wants extra space at night or just a solo sleeper wanting to sleep like royalty, our king size mattresses are guaranteed to do the job.

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.

Are you not sure on whether a king size mattress will suit you best, whether you need some of the special features, or whether you'll have the space to accommodate one? Take a look at our Mattress Buying Guide and our Measuring Guide. to find out more

How is a king size mattress different from a European king size mattress?

If you’ve been browsing our range of mattresses, you may have noticed that we also stock European king size mattresses. So what’s the difference?

European mattresses are slightly larger than those we have here in the UK. Whereas a standard UK king mattress measures 150cm x 200cm, a European king measures 160 x 200 cm, giving you an extra 10cm of sleep space.

You should only opt for a European king mattress if you have a European king bed frame. It won’t fit a standard UK king size bed.

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 - designed to mould to your body during the night, a memory foam mattress provides phenomenal support to your joints.
  • Pocket sprung king size mattresses - the perfect choice for couples, a pocket sprung king size mattress will distribute weight evenly thanks to the individual pocket springs.
  • Open coil spring king size mattresses - get the ultimate support during the night with an exceptionally comfortable open coil spring king size mattress.
  • King size white filling mattresses - get extra comfort while sleeping with one of our king size white filling mattresses.
  • King size natural filling mattresses - filled with natural materials such as cotton, wool and more, our king size natural filling mattresses provide a relaxing sleep.
  • King size reflex foam mattresses - a reflex foam mattress is designed to provide extra support during the night by moulding to your body and returning to its original shape.
  • King size latex foam mattresses - choose an eco-friendly option with your mattress, as latex foam mattresses are made from natural materials.

How much is a king size mattress?

Despite their large size, our king size mattresses are surprisingly affordable. Prices for our king size mattresses start at under £150 and go up to around £1,400. Whether you’re working with a smaller budget or want to splash out, there’s a king mattress to suit you in our range.

Can I buy a king size bed and mattress together?

You can! We stock a wide range of king size bed frames in a selection of styles, so why not buy your king size bed and mattress together? Buy your king size bed and mattress at the same time and save 10%!

Excellent
4.4 out of five star rating on Trustpilot
Rated 4.4 / 5 based on 12,047 reviews on
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I think the whole thing went perfectly…
I think the whole thing went perfectly…
I think the whole thing went perfectly from start t finis
Very good
Very good
Brilliant material, easy assembly, very nice service
Excellent customer service!!
Excellent customer service!!
Kyi from Happy Beds was excellent in sorting a problem out. Amazing customer service!. Thank you!! Mr Edwards
Fantastic mattress
Fantastic mattress
Fantastic mattress, very comfortable
Really good customer service from…
Really good customer service from…
Really good customer service from Chantal. She was very professional and dealt with my query very efficiently and quickly.
Great thanks
Great thanks
First class service throughout from Happy Beds. Thank you very much. Mattress delivered earlier than expected. Delivery guys very friendly and professional. They found the marina very easy. I went to them after phone call, to say they had arrived. Helped me load mattress on a trolley, waved bye. Mattress looks great and fits perfect. Highly recommend Happy Beds.
Great company even better customer service
Great company even better customer service
Quick delivery, good quality items. Customer service is great, we were speaking to a lady called Aimee as one of the parts for the bed was faulty. Dealt with it quickly and replacement sent a couple days after the initial enquiry. Thank you
Great prices and even better customer…
Great prices and even better customer…
Great prices and even better customer service. really impressed with this company. bunk beds are great and the problem I had was resolved by Caroline and Sophie with no hassle. Would definitely buy from them again
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