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King Size Mattresses

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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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53 products
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Silentnight Pocket Essentials 1000 King Size Mattress favorite_border favorite

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

Product 1
Breasley Uno Memory Pocket 1000 King Size Mattress favorite_border favorite

Breasley Uno Memory Pocket 1000 King Size Mattress
£299.99

Product 2
Silentnight Mattress Now 7 Zone Memory Foam King Size Mattress favorite_border favorite

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

Product 3
Breasley Uno Memory Pocket 2000 King Size Mattress favorite_border favorite

Breasley Uno Memory Pocket 2000 King Size Mattress
£399.99

Product 4
Silentnight Mattress Now King Size King Size Mattress favorite_border favorite

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

Product 5
Silentnight Pocket Essentials 1000 Memory King Size Mattress favorite_border favorite

Silentnight Pocket Essentials 1000 Memory King Size Mattress
£399.99
stars-ratings 8 reviews

Product 6
Sleepeezee Backcare Deluxe 1000 King Size Mattress favorite_border favorite

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

Product 7
Silentnight Mattress Now 3 Zone Memory Foam King Size Mattress favorite_border favorite

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

Product 8
Sealy Jubilee Latex Foam King Size Mattress favorite_border favorite

Sealy Jubilee Latex Foam King Size Mattress
£499.99
stars-ratings 1 review

Product 9
Breasley Uno Vitality Plus King Size Mattress favorite_border favorite

Breasley Uno Vitality Plus King Size Mattress
£279.99

Product 10
Healthopaedic Silk 1000 King Size Mattress favorite_border favorite

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

Product 11
Breasley Uno Pocket 2000 King Size Mattress favorite_border favorite

Breasley Uno Pocket 2000 King Size Mattress
£349.99

Product 12
Supreme Vasco Memory Foam King Size Mattress favorite_border favorite

Supreme Vasco Memory Foam King Size Mattress
£259.99
stars-ratings 1 review

Product 13
Sealy Guernsey Gel King Size Mattress favorite_border favorite

Sealy Guernsey Gel King Size Mattress
£659.00

Product 14
Sealy Pearl Luxury King Size Mattress favorite_border favorite

Sealy Pearl Luxury King Size Mattress
£599.99
stars-ratings 5 reviews

Product 15
Sealy Pearl Geltex King Size Mattress favorite_border favorite

Sealy Pearl Geltex King Size Mattress
£549.99

Product 16
Silentnight Amsterdam Ortho King Size Mattress favorite_border favorite

Silentnight Amsterdam Ortho King Size Mattress
£319.99

Product 17
Sealy Pearl Ortho King Size Mattress favorite_border favorite

Sealy Pearl Ortho King Size Mattress
£499.99
stars-ratings 1 review

Product 18
Dura Crystal King Size Mattress favorite_border favorite

Dura Crystal King Size Mattress
£249.99

Product 19
Sealy Sark Gel King Size Mattress favorite_border favorite

Sealy Sark Gel King Size Mattress
£589.00

Product 20
Sealy Nostromo Latex Foam King Size Mattress favorite_border favorite

Sealy Nostromo Latex Foam King Size Mattress
£849.99

Product 21
Sealy Aspen King Size Mattress favorite_border favorite

Sealy Aspen King Size Mattress
£269.99

Product 22
Sealy Pearl Memory King Size Mattress favorite_border favorite

Sealy Pearl Memory King Size Mattress
£449.99

Product 23
Silentnight Rio Cushion Top King Size Mattress favorite_border favorite

Silentnight Rio Cushion Top King Size Mattress
£299.99

Product 24
Sealy Pearl Wool King Size Mattress favorite_border favorite

Sealy Pearl Wool King Size Mattress
£449.99

Product 25
Sealy Mulberry King Size Mattress favorite_border favorite

Sealy Mulberry King Size Mattress
£249.99
stars-ratings 2 reviews

Product 26
Silentnight Oslo Memory Cushion Top King Size Mattress favorite_border favorite

Silentnight Oslo Memory Cushion Top King Size Mattress
£379.99

Product 27
Rest Assured Harewood 800 Memory Foam King Size Mattress favorite_border favorite

Rest Assured Harewood 800 Memory Foam King Size Mattress
£399.00
stars-ratings 1 review

Product 28
Dura Pocket Memory 1000 King Size Mattress favorite_border favorite

Dura Pocket Memory 1000 King Size Mattress
£349.99

Product 29
Sealy Alderney Gel King Size Mattress favorite_border favorite

Sealy Alderney Gel King Size Mattress
£529.00

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.