We value your privacy

Our website uses cookies to enhance your experience, serve personalized ads and analyze our traffic. To learn more, see our Cookie Policy

Summer Sale ends in
 
8hrs
 
16mrs
 
18srs
Shop deals

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

Show more
119 results

Rated
Excellent

Trustpilot Star rating

Based on 28,347 reviews

Trustpilot Star rating Verified

Fast delivery and delivery workers take care willing to wear the shoes protective shells so won't make my carpets messy and delivery in time.

Yuk-fong Yau 24th Jul
Trustpilot Star rating Verified

It was quick to arrive we were informed whenthe mattress has enabled me to sleep better and i'm hoping will improve my husbands back painthank you

Kathleen Hall 24th Jul
Trustpilot Star rating Verified

Great service. Delivery was excellent great communication from company and a time slot and a call from driver before delivery, excellent customer service.

Mick Wilsoncustomer 24th Jul

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.