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King size mattresses

All Mattresses | Memory Foam Mattresses | Pocket Sprung Mattresses | King Size Beds

The range of king size mattresses at DFS has something for everyone - no matter your budget or sleep needs. Just like our single, small double, double and super king size mattresses, our king mattresses are available in a range of firmness levels - so whether you prefer a sink-in soft king size mattress, an option somewhere in the middle, or the support of a firm king size mattress, we have plenty of options to suit you. There’s also lots of choice when it comes to the type of king size bed mattress you can choose - including luxury memory foam king size mattresses, budget-friendly king size gel or foam mattresses, or even a hybrid king size mattress for the best of both worlds.

Found your perfect king mattress? Check out our selection of king size beds to complete your best night’s sleep yet.

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What are the measurements of a king size mattress?

A standard king size mattress size is 5 feet wide by 6 feet 6 inches in length, or 150cm by 200cm. All king mattresses available at DFS will fit our king size beds. You just need to be mindful of the height of the mattress - this does vary, and some extra thick mattresses will peek above the ends of lower footboards, which might not be the look you’re going for.

How much is a good king size mattress?

You can expect to pay between £300 and £2,500 for a quality king size mattress - with the mattresses at the top end of the scale performing best for lasting support, temperature regulation, movement isolation and more. Don’t forget - a quality king mattress will last you many years, so it pays to choose the best you can afford. For extra peace of mind, all our king size mattresses at DFS come with a minimum of a 2 year guarantee, with some carrying up to a 7 year guarantee.

What types of king size mattresses are there?

As they’re one of the most popular mattress size options, king mattresses are available in a huge range of types - pocket sprung, memory foam, hybrid, open coil, gel, foam, rolled and more - so it’s easy to find the perfect king size mattress to suit all your needs. Each option is available in a range of firmness levels too, so whether you prefer a soft king size mattress or a firm king size mattress, you can find the perfect fit. For help choosing the best king mattress for you, check out our mattress buying guide.

Which king size mattress is best for me?

It all depends on what you are looking for in a king size mattress! Is it an affordable king size foam or gel mattress? The convenience of a boxed or rolled king size mattress? The comfort of a luxury pocket sprung or memory foam king size mattress? For some, the science-backed Sealy posturepedic king mattresses will be the best option - while others might prefer the convenience of a Silentnight Just Sleep rolled mattress. For more help figuring out which king size bed mattress might be right for you, check out our mattress buying guide.

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