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 237 product(s)
Sealy Casoli King Size Latex Foam Mattress Sealy Casoli King Size Latex Foam Mattress
Sealy Casoli Latex Foam Mattress - King Size
£599.99
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Stock expected 07 December
Sealy Aspen King Size Mattress Sealy Aspen King Size Mattress
Sealy Aspen Mattress - King Size
£229.99
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Next day delivery
Sealy Nostromo King Size Latex Foam Mattress Sealy Nostromo King Size Latex Foam Mattress
Sealy Nostromo Latex Foam Mattress - King Size
£699.99
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Stock expected 07 December
Sealy Mulberry King Size Mattress Sealy Mulberry King Size Mattress
Sealy Mulberry Mattress - King Size
£229.99
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Next day delivery
Cumfilux Ortholux King Size Mattress Cumfilux Ortholux King Size Mattress
Cumfilux Ortholux Mattress - King Size
£184.80
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Stock expected 22 December
Sealy Bluebell King Size Mattress Sealy Bluebell King Size Mattress
Sealy Bluebell Mattress - King Size
£299.99
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7-14 days 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.