Super King Mattresses

What size is a super king mattress?

A super king mattress measures 180 x 200cm (71 x 79 inches). Super king mattress dimensions give you a generous 30cm more width than a king size mattress, giving you more than a foot of extra elbow room, making them a great choice for couples who like their space.

Read our mattress size guide to compare the options.

What types of super king size mattresses are there?

Super king mattresses come in a variety of fillings, each suited to different sleepers.

Memory foam super king mattresses mould to your body shape, easing pressure points and absorbing movement so you barely notice your partner turning over.

Latex super king mattresses work in a similar way to memory foam, with a bouncier, more responsive feel.

Pocket sprung super king size mattresses use individually wrapped springs that react to your body's shape, preventing you from rolling or disturbing each other during the night.

Gel super king size mattresses add a cooling layer on top, pulling heat away from your body through the night. These are a great option for hot sleepers.

Zip and link super king mattresses are two singles zipped together to make one super king. Perfect if you and your partner want different comfort grades, or just fancy your own duvet.

Natural super king size mattresses use materials like wool and cotton. They're breathable, hypoallergenic, and kinder to the planet than most synthetic options.

Traditional spring super king mattresses use one open coil system. They’re bouncier to the touch, and usually the most affordable super king size option.

Read our mattress types guide for an in-depth breakdown of each filling.

What firmness ratings do super king mattresses come in?

Firmness comes down to how the mattress feels underneath you and how well it supports your spine while you sleep. Each type is suited to different sleepers and different sleeping positions.

Soft super king size mattresses sink in around your hips and shoulders, easing pressure for side sleepers. They’re great if you like that cloud-like cushioning feel.

Medium super king mattresses balance support and give, working well for side or back sleepers and anyone who switches positions throughout the night.

Firm super king size mattresses offer more resistance, keeping your spine aligned if you sleep on your back or front, or deal with back pain.

Very firm super king mattresses are the firmest option, ideal for heavier sleepers or anyone needing extra support for chronic back or joint pain.

For more help choosing the right firmness, read our mattress firmness guide.

How much is a super king size mattress?

Prices for a super king size mattress can vary. The cost depends on several factors, including the materials used. Natural fillings and multi-layer memory foam tend to cost more than basic spring interiors, while features such as cooling gel and individually wrapped pocket springs can also increase the price. The brand can also play a role in the overall cost.

What is the best super king mattress?

There's no single best super king size mattress, it depends on your preferred comfort level, sleeping position and how you sleep. Gel super king mattresses are popular among hot sleepers, while memory foam or latex are the better choices for those seeking pressure relief. For light sleepers or those who get woken up by their partner tossing and turning, pocket springs are the way to go.

Why choose a super king size mattress?

A super king mattress isn't just about looking impressive in the bedroom; it can make a big difference to your sleep, especially if you share your bed. Our latest Sleep Survey found that 35% of UK bed-sharers say their partner takes up too much space, while 23% are bothered by the heat they give off. A super king puts a little more distance between you both. The extra width gives you more room to spread out, whether that's you, your partner or the kids who crawl in at 6am.

Super king size mattresses are also a great choice for taller sleepers, with the extra length helping to make sure no toes end up hanging over the end. Not sure if this size suits your setup? Our guide to the best bed size for couples breaks it down further.

Do your super king size mattresses come with a guarantee?

A super king mattress is a big investment in size and cost, so we want you to get it right. That's why every Dreams super king size mattress comes with our 100-Night Sleep Guarantee, giving you up to 100 nights to swap it if it's not quite right. For more details, head to our 100-night guarantee page.

How will I get a super king mattress to my bedroom?

Every super king mattress comes with free delivery to your door, or you can have it delivered to your room of choice if you'd rather we navigate the stairs and corners. Check our delivery options for more information. If you need your old mattress removing first, our recycling service can cover that, too.