King Size Mattresses

Getting a good night's sleep is vital for your health and a general sense of well-being, so it's important to choose the right mattress With one of our king size mattresses, you can be sure you're getting value, quality, comfort and craftsmanship.

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Showing 240 product(s)
Sealy Pearl Geltex King Size Mattress Sealy Pearl Geltex King Size Mattress
Sealy Pearl Geltex Mattress - King Size
£499.99
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Stock expected 10 March
Silentnight Athens 1400 Mirapocket Ortho King Size Mattress Silentnight Athens 1400 Mirapocket Ortho King Size Mattress
Silentnight Athens Ortho 1400 Mattress - King Size
£419.99
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Stock expected 27 February
Sealy Pearl Luxury King Size Mattress Sealy Pearl Luxury King Size Mattress
Sealy Pearl Luxury Mattress - King Size
£359.99
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7-14 days delivery*
Sealy Casoli King Size Latex Foam Mattress Sealy Casoli King Size Latex Foam Mattress
Sealy Casoli Latex Foam Mattress - King Size
£469.99
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Stock expected 08 March
Sealy Mulberry King Size Mattress Sealy Mulberry King Size Mattress
Sealy Mulberry Mattress - King Size
£249.99
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Next day delivery
Sealy Aspen King Size Mattress Sealy Aspen King Size Mattress
Sealy Aspen Mattress - King Size
£249.99
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Next day delivery
Slumberland Divine Mattress King Size Slumberland Divine Mattress King Size
Slumberland Divine Mattress - King Size
£749.70
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4-6 weeks delivery*

About King Size Mattresses

You'll be sure to get a great night's sleep on one of our high quality 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 has to 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.