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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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75 products
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Sealy Pearl Luxury King Size Mattress

Sealy Pearl Luxury Mattress - King Size
£359.99
stars-ratings 4 reviews

Product 1
Silentnight Pocket Essentials 1000 Mirapocket King Size Mattress

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

Product 2
Silentnight Mattress Now King Size Mattress

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

Product 3
Sealy Pearl Ortho King Size Mattress

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

Product 4
Silentnight Mattress Now 3 Zone King Size Memory Foam Mattress

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

Product 5
Silentnight Pocket Essentials 1000 Mirapocket Memory King Size Mattress

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

Product 6
Healthopaedic Silk 1000 King Size Mattress

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

Product 7
Sealy Mulberry King Size Mattress

Sealy Mulberry Mattress - King Size
£249.99

Product 8
Silentnight Mattress Now 7 Zone King Size Memory Foam Mattress

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

Product 9
Silentnight Geltex Mirapocket 1000 King Size Mattress

Silentnight Geltex 1000 Mattress - King Size
£599.99

Product 10
Sealy Jubilee Ortho King Size Memory Foam Mattress
£50 off

Sealy Jubilee Ortho Memory Foam Mattress - King Size
£279.99 was £329.99

Product 11
Sealy Casoli King Size Latex Foam Mattress

Sealy Casoli Latex Foam Mattress - King Size
£549.99

Product 12
Sealy Jubilee Latex King Size Latex Foam Mattress

Sealy Jubilee Latex Foam Mattress - King Size
£399.99
stars-ratings 1 review

Product 13
Sealy Pearl Memory King Size Memory Foam Mattress

Sealy Pearl Memory Memory Foam Mattress - King Size
£399.99
stars-ratings 3 reviews

Product 14
Silentnight Pocket Naturals Mirapocket 1350 King Size Mattress

Silentnight Pocket Naturals 1350 Mattress - King Size
£529.99

Product 15
Silentnight Oslo Miracoil Memory Cushion Top King Size Mattress

Silentnight Oslo Memory Cushion Top Mattress - King Size
£379.99

Product 16
Silentnight Amsterdam Miracoil Ortho King Size Mattress

Silentnight Amsterdam Ortho Mattress - King Size
£319.99

Product 17
Silentnight Rio Miracoil Cushion Top King Size Mattress

Silentnight Rio Cushion Top Mattress - King Size
£299.99

Product 18
Sealy Pearl Contour King Size Memory Foam Mattress
£70 off

Sealy Pearl Contour Memory Foam Mattress - King Size
£449.99 was £519.99

Product 19
Kayflex Pillow Top Mattress King Size

Kayflex Pillow Top Mattress - King Size
£349.99

Product 20
Kayflex Platinum Memory Foam Mattress King Size

Kayflex Platinum Memory Foam Mattress - King Size
£349.99

Product 21
Kayflex Latex Pearl 1200 Mattress King Size

Kayflex Latex Pearl 1200 Mattress - King Size
£449.99

Product 22
Vogue Palladium Star Mattress - King Size
£50 off

Vogue Palladium Star Mattress - King Size
£239.99 was £289.99

Product 23
Vogue Serene Gel 2000 King Size Gel Mattress
£150 off

Vogue Serene Gel 2000 Gel Mattress - King Size
£449.99 was £599.99

Product 24
Simmons Ultimate Backcare King Size Mattress

Simmons Ultimate Backcare Mattress - King Size
£249.99

Product 25
Sealy Aspen King Size Mattress

Sealy Aspen Mattress - King Size
£269.99

Product 26
Myers Supreme Latex Comfort 1800 Mattress King Size

Myers Supreme Latex Comfort 1800 Mattress - King Size
£651.00

Product 27
Myers Supreme Memory Comfort 1400 Mattress King Size

Myers Supreme Memory Comfort 1400 Mattress - King Size
£550.20
stars-ratings 1 review

Product 28
Myers Supreme Comfort 1000 Mattress King Size

Myers Supreme Comfort 1000 Mattress - King Size
£449.40

Product 29
Slumberland Serene Mattress King Size

Slumberland Serene Mattress - King Size
£1249.50

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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