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Kingsize Memory Foam Mattresses

If you're tired of not having enough space in bed, the problem could be your mattress. If you want extra room to stretch out in or more space for you and your partner to enjoy, why not choose one of our king-size memory foam mattresses?

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Based on 21,561 reviews

Trustpilot Star rating Verified

Great service and communication . Delivery was on time and the delivery men friendly and helpful. Would definitely recommend. Very pleased with mattress, thanks!only negative cost of removing old single mattress was a bit pricey.

Lin B 29th Feb
Trustpilot Star rating Verified

Mattress delivered quickly and taken to my room as I asked. Delivery drivers missed the old one being taken away but checked paperwork and grabbed it.Website was decent, prices were fair and beat the competition (recycling and delivery were over 30 cheaper) and their range was great

Kevin Smith 29th Feb
Trustpilot Star rating Verified

Excellent. Highly recommend. Next day delivery. Clear efficient communication. Call an hour before hand to confirm arrival time. Product is excellent. Nothing to fault.

Andrew 29th Feb

Help & Buying Guides

How to choose the best king-size memory foam mattresses

The technology in our king-size memory foam mattresses comes straight from NASA! This should give you full confidence that it is not only created by experts but also effective in promoting better rest.

We're confident that you will enjoy sleep that is truly out of this world on this kind of mattress. Our buying guide section has plenty of information you can use to help you determine whether memory foam will be the right fit for your new bed.

What size is a king-size memory foam mattress?

A king-size memory foam mattress is the same size as a standard king-size mattress, measuring 5 feet wide and 6 feet 6 inches long. Bear in mind that European and specific brands, such as Ikea, have slightly different dimensions and may be an inch or two larger than the standard size.

How much bigger is a king-size memory foam mattress than a double?

A standard double memory foam mattress is 135 x 190cm or 4’6 x 6’3, so a king-size option will be six inches wider and around three inches longer.

Can king-size mattresses fit on double bed frames?

Although they will sit on top of a double bed frame, there will be a certain amount of overhang on the sides and at the foot. This could mean that anyone sitting on the edge of the bed could tip the mattress. A king-size mattress should be partnered up with the correct king-size bedstead to ensure stability and comfort right to the edge of the sleeping area.

How much does a king-size memory foam mattress weigh?

You may find that your king-size memory foam mattress weighs more than you think. When fully expanded (after unboxing and packing), the average king-size memory foam mattress weighs around 100-160 lbs, depending on the density of the foam. The denser the foam, the heavier the mattress, so a king-size firm memory foam mattress will definitely weigh more than your typical mattress! However, you can find boxed king sized memory foam mattresses, such as in our Coolflex range - these rolled and vacuum packed models make it much easier to carry your new bed up the stairs.

Can you get mattress toppers for a king-size memory foam mattress?

Yes. Any standard king-size mattress topper will fit onto a king-size memory foam mattress, giving an even softer and more cushioned feel.