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King Size Mattresses

  • NBF
  • Price Match Promise
Getting a good night's sleep is vital, so it’s important to choose the right mattress. With our king size mattresses, you're getting value, quality, comfort and craftsmanship.
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73 products
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Sealy Pearl Luxury King Size Mattress
£30 off

Sealy Pearl Luxury Mattress - King Size
£329.99 was £359.99
stars-ratings 5 reviews

Product 1
Silentnight Pocket Essentials 1000 Mirapocket King Size Mattress
£30 off

Silentnight Pocket Essentials 1000 Mattress - King Size
£269.99 was £299.99
stars-ratings 4 reviews

Product 2
Silentnight Mattress Now King Size Mattress
£10 off

Silentnight Mattress Now Mattress - King Size
£149.99 was £159.99
stars-ratings 1 review

Product 3
Silentnight Mattress Now 3 Zone King Size Memory Foam Mattress
£20 off

Silentnight Mattress Now 3 Zone Memory Foam Mattress - King Size
£219.99 was £239.99
stars-ratings 1 review

Product 4
Silentnight Pocket Essentials 1000 Mirapocket Memory King Size Mattress

Silentnight Pocket Essentials 1000 Memory Mattress - King Size
£399.99
stars-ratings 7 reviews

Product 5
Silentnight Mattress Now 7 Zone King Size Memory Foam Mattress

Silentnight Mattress Now 7 Zone Memory Foam Mattress - King Size
£279.99

Product 6
Sealy Pearl Ortho King Size Mattress

Sealy Pearl Ortho Mattress - King Size
£329.99
stars-ratings 1 review

Product 7
Healthopaedic Silk 1000 King Size Mattress

Healthopaedic Silk 1000 Mattress - King Size
£299.99
stars-ratings 3 reviews

Product 8
Kayflex Pillow Top Mattress King Size

Kayflex Pillow Top Mattress - King Size
£349.99

Product 9
Sleepeezee Backcare Deluxe 1000 King Size Mattress

Sleepeezee Backcare Deluxe 1000 Mattress - King Size
£299.99
stars-ratings 4 reviews

Product 10
Slumberland Divine Mattress King Size

Slumberland Divine Mattress - King Size
£749.70

Product 11
Breasley Uno Memory Pocket 2000 King Size Mattress

Breasley Uno Memory Pocket 2000 Mattress - King Size
£399.99

Product 12
Breasley Uno Pocket 2000 King Size Mattress

Breasley Uno Pocket 2000 Mattress - King Size
£349.99

Product 13
Breasley Uno Memory Pocket 1000 King Size Mattress

Breasley Uno Memory Pocket 1000 Mattress - King Size
£299.99

Product 14
Breasley Uno Vitality Plus King Size Mattress

Breasley Uno Vitality Plus Mattress - King Size
£279.99

Product 15
Simmons 800 Latex King Size Mattress
£270 off

Simmons 800 Latex Mattress - King Size
£179.99 was £449.99

Product 16
Sealy Guernsey King Mattress
£30 off

Sealy Guernsey Gel Mattress - King Size
£629.00 was £659.00

Product 17
Sealy Sark King Mattress
£40 off

Sealy Sark Gel Mattress - King Size
£549.00 was £589.00

Product 18
Sealy Alderney King Mattress
£30 off

Sealy Alderney Gel Mattress - King Size
£499.00 was £529.00

Product 19
Slumberland Gold Seal 2200 Latex Foam Mattress King Size

Slumberland Gold Seal 2200 Latex Foam Mattress - King Size
£899.00

Product 20
Slumberland Silver Seal 2000 Mattress King Size

Slumberland Silver Seal 2000 Mattress - King Size
£999.00

Product 21
Slumberland Bronze Seal 1800 Mattress King Size

Slumberland Bronze Seal 1800 Mattress - King Size
£799.00

Product 22
Slumberland Copper Seal 1600 Mattress King Size

Slumberland Copper Seal 1600 Mattress - King Size
£699.00

Product 23
Sealy Pearl Geltex Mattress King Size

Sealy Pearl Geltex Mattress - King Size
£499.99

Product 24
Sealy Pearl Wool Mattress King Size

Sealy Pearl Wool Mattress - King Size
£399.99

Product 25
Sealy Pearl Memory Mattress King Size

Sealy Pearl Memory Mattress - King Size
£399.99

Product 26
Kayflex Platinum Memory Foam Mattress King Size

Kayflex Platinum Memory Foam Mattress - King Size
£349.99

Product 27
Kayflex Latex Pearl 1200 Mattress King Size

Kayflex Latex Pearl 1200 Mattress - King Size
£449.99

Product 28
Vogue Palladium Star Mattress - King Size
£90 off

Vogue Palladium Star Mattress - King Size
£199.99 was £289.99

Product 29
Vogue Serene Gel 2000 King Size Gel Mattress
£250 off

Vogue Serene Gel 2000 Gel Mattress - King Size
£349.99 was £599.99

Product 30
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About King Size Mattresses

You'll wake up feeling refreshed every morning after a night on one of our king size mattresses. With the many advantages of restful sleep, from improved concentration to a whole range of health benefits, a new king size mattress might be one of the most important investments you will ever make. And at such a luxurious size, there should be ample space for both you and your partner to stretch out, relax and snooze in comfort.

Our 5ft king size mattresses range from memory foam, no-turn mattresses to the superlative support of our orthopaedic mattresses and responsive pocket-sprung mattresses, with fine covers of cashmere or silk, and luxurious fillings such as cotton or hand-teased lambswool or horsehair. If joint pain is a concern, you may want to choose a memory foam mattress, which moulds itself to your body shape. Or for superior comfort levels, you could go for latex and pocket springs. Those who favour a firmer, harder surface to sleep on might prefer an open coil mattress - it's a more traditional choice.

And there are still more ways to make sure your new mattress is exactly what you need. Answer some simple questions and our mattress selector will suggest your perfect match. Or take a look at our in depth mattress guide. it's also reassuring to know that our mattresses are dust-mite resistant, and many are hypo-allergenic - welcome news for allergy-sufferers. And with a range of support levels, from soft through to very firm, available across all the big brand names, you're sure to find something that will suit you perfectly - especially as our mattresses will fit'standard UK bed bases.

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