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King Size Mattresses

King size mattresses offer comfort, space and support all in one! Measuring 5' by 6'6", a king mattress is great for couples or solo sleepers as it offers more space than a double mattress, giving you room to spread out during the night. Not only that, but our king size mattresses come in various firmness ratings and types to suit any sleeper in any home, so what are you waiting for?

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Arun Open Coil Spring Semi-Orthopaedic Mattress
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Arun Open Coil Spring Semi-Orthopaedic Mattress
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Mersey Memory and Reflex Foam 1000 Pocket Sprung Mattress
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Mersey Memory and Reflex Foam 1000 Pocket Sprung Mattress
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Severn 3000 Pocket Sprung Orthopaedic Natural Mattress
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Severn 3000 Pocket Sprung Orthopaedic Natural Mattress
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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
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Signature Crystal 3000 Pocket Sprung Orthopaedic Natural Mattress
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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
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Ortho Royale Spring Orthopaedic Mattress
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Ortho Royale Spring Orthopaedic Mattress
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Balmoral 3500 Pocket Sprung Memory Foam Mattress
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Balmoral 3500 Pocket Sprung Memory Foam Mattress
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Pinerest Spring Semi-Orthopaedic Quilted Fabric Mattress
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Pinerest Spring Semi-Orthopaedic Quilted Fabric Mattress
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Thames 1000 Pocket Sprung Orthopaedic Mattress
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Thames 1000 Pocket Sprung Orthopaedic Mattress
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Foyle Open Coil Spring Mattress
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Foyle Open Coil Spring Mattress
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Calder Spring Memory Foam Tufted Mattress
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Calder Spring Memory Foam Tufted Mattress
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Signature Gold 1800 Pocket Sprung Orthopaedic Natural Mattress
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Majestic 1000 Pocket Sprung Orthopaedic Mattress
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Majestic 1000 Pocket Sprung Orthopaedic 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
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Cashmere 3000 Pocket Sprung Memory Foam Mattress
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Cashmere 3000 Pocket Sprung Memory Foam Mattress
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Membound Memory Foam Spring Mattress
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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
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Tyne Open Coil Spring Orthopaedic Mattress
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Tyne Open Coil Spring Orthopaedic Mattress
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Derwent Open Coil Spring Reflex Foam Orthopaedic Mattress
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Derwent Open Coil Spring Reflex Foam Orthopaedic Mattress
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Aire Memory and Reflex Foam 1000 Pocket Sprung Mattress
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Aire Memory and Reflex Foam 1000 Pocket Sprung Mattress
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Deluxe Memory Foam Spring Rolled Mattress
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Deluxe Memory Foam Spring Rolled Mattress
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SleepSoul Cloud 800 Pocket Spring Mattress
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SleepSoul Cloud 800 Pocket Spring 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
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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.

Excellent
4.4 out of five star rating on Trustpilot
Rated 4.4 / 5 based on 13,114 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