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Super King Mattresses

If you're after the ultimate night's sleep in comfort and quality, then look no further than our impressive collection of super king-size mattresses. Spacious, supportive, and irresistibly sumptuous, our curated selection of super king mattresses is designed to provide you with a bed that offers an incredible night's sleep, each and every day. Take your time browsing our filterable range below or head to the bottom for more details on these enormous mattresses.

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Trustpilot Star rating

Based on 23,378 reviews

Trustpilot Star rating Verified

We were kept updated all the way through from purchase right up until delivery which was very helpful.

Linda Rudd 11th Jul
Trustpilot Star rating Verified

From ordering to delivery they were very good. Ordering offices very easy, delivery very quick and delivery company very efficient and careful.

Anita B 9th Jul
Trustpilot Star rating Verified

So far so good with the mattress, the quality is excellent and is as described. First class speedy delivery service received and would not hesitate to recommend.

Vicki 9th Jul

Help & Buying Guides

Finding your perfect super king size mattress

Exuding comfort and luxury, all of our 6ft super king mattresses are the perfect combination of high-quality materials and innovative technology. We have mattresses to suit every need – whether you need a certain design, firmness, spring count or depth to complement your super king bed frame. We also have super king memory foam mattresses, contoured surfaces, spinal support and those with hypoallergenic properties.

At MattressNextDay, we’re proud stockists of super king mattresses, and Super King size divan beds, from a number of prestigious brands, including Reylon, Sleepeezee, Dreamland Beds and Silentnight. So, regardless of the model you go for, you can trust that your chosen design will continue to look and feel its best year after year.

How big is a super king mattress?

Super-king mattresses measure 180cm wide and 200cm long. In imperial dimensions, super king mattresses measure 6 feet in width and 6ft 6" in length. Super-king mattresses offer a spacious sleeping space and are the largest mattress size available in the UK.

Make sure to check the super king-size bed dimensions on your super king mattress to avoid disappointment.

Wondering what bed is bigger than a super king? Find out more on our Mattress Size Guide.

Why choose a Super King Size mattress?

If you want a large mattress then the Super King mattress is the obvious choice – with the largest measuring 6ft in length. There are so many benefits in choosing a Super King Size mattress. Here, we’ll take a look at some of the key reasons to choose super king:

  • Extra sleeping space - With a super king, you can expect extra sleeping space and a restful night’s sleep – ideal if you or your partner tend to shuffle around in your sleep. Measuring 6ft in length, super king mattresses are a whole foot longer than a standard king size mattress.
  • Extra space for tall partners - If you or your partner is tall, then this size is the obvious choice. As you’d expect, they’re the longest mattress available, ideal for those taller than 6ft. If you want a mattress that really ensures that you do not disturb your partner, then opt for a pocket sprung or memory foam Super King mattress, or a combination of both as these are designed to cope with different weights and movement, resulting in a mattress that will not dip or sag.
  • A wide range of materials and fillings - Super-king mattresses are available in a range of depths, comfort levels, and fillings to suit every preference. We also provide a huge range of materials including cotton, cashmere, lambswool, silk and even latex to name a few! Super king latex mattresses work in the same way as a super king memory foam mattress but are a more affordable option. So, if you want lots of space, extra comfort, all at a great cost, consider a super king latex style.

What is the best super king mattress?

The best super king mattress will come down to personal preference. Depending on the level of firmness you prefer, you might find one type of mattress – from hybrid to innerspring to foam – more comfortable than another. To find the best super king mattress consider the following:

  • Whether you normally sleep on your back, front, or side
  • What your budget is
  • Whether you suffer from lower back pain
  • If you are sleeping alone or with a partner
  • How much you weigh

Once you’ve thought about these considerations, take a look at the firmness and material specifications on each product to decide which is the best model for you. We offer a whole host of super king bed and mattress deals!

For more info on bed size super king read our mattress buying guide. Furthermore, you can read our handy guide, giving advice on what firmness of mattress is best.  

Do you sell super king linen?

Yes, we stock both fitted sheets and mattress protectors in this size, so you can ensure that you will have all the accessories you need to accompany your brand new mattress. Choose a range of colours and styles from our bedding collection which includes duvetspillows, mattress toppers, mattress protectors and more.

How long will I have to wait for my mattress to arrive?

MattressNextDay does exactly what our name suggests! We can ensure that your new super king mattress is delivered directly to your door anywhere in the UK within a 24-hour time frame. We can also provide a two-hour window for the delivery time, meaning that you won't have to disrupt your daily activities by waiting around for our delivery team! Be aware that there are certain mattresses which require a longer delivery, but these will be clearly signposted. If you’re at all unsure, speak to our team today.

Why choose a mattress from MattressNextDay?

With fast mattress delivery, a price match promise & hassle-free returns policy it's easy to see why so many have purchased their super king size bed with us. To purchase your super king mattress today follow the below guide:

  • Read our Mattress Buying Guide to help you choose the best mattress for you
  • Add the item to your basket and double-check the size, type and delivery options are all correct. We can also recycle your old mattress if you require
  • Click to buy and your payment will be taken over our secure payment system.
  • Enjoy your new mattress the very next day!

Types of super king-size mattress

Pillow top mattresses

If you want a cloud-soft sensation as you sink into bed at night but still want a higher level of support, a pillow top super king-size mattress is a great choice. that gorgeously soft upper layer gives you that snugglability, while the main body provides you with plenty of support. Ideal for front, back and side sleepers.

Orthopaedic mattresses 

A firmer feel, greater support, and less roll-together make an orthopaedic super king-size mattress a great choice. They’re also ideal if you’re a little larger and want to avoid that sagging feeling when you get into bed. Orthopaedic mattresses are great for back problems, but you should consult your GP or medical team first. 

CoolGel mattresses 

If you suffer from hot flushes at night, or just prefer a cooler sleeping environment, look for super king-size mattresses with a CoolGel or Coolflex addition. Designed to make it easier to regulate your body temperature at night, the inclusion of CoolGel makes these a real favourite.

Memory foam mattresses 

Memory foam super king-size mattresses are designed to cushion the body and cradle it, giving you a more restful night’s sleep. They’re soft and comfortable but with enough support to keep your spine in that all-important neutral position. Ideal for side, front and back sleepers. 

Open Coil mattresses 

A traditional method of mattress manufacturing that’s been used for hundreds of years, open coil mattresses use a matrix of open coils all working together to provide support and comfort. These are often cheaper than other types of mattresses and are a good option if you’re buying on a budget. 

Pocket spring mattresses 

Each spring in a pocket spring super king-size mattress sits in its own cloth pocket. It can act independently or in tandem with the rest of the springs, giving you a more responsive mattress that minimises movement transference.  

Hybrid mattresses 

Get the best of both worlds with hybrid mattresses. These use a sprung core for support, with layers of memory foam on top to provide that cushioned feel. The sprung core allows the air to flow through naturally, making them cooler than pure memory foam options.    

Natural fibres 

Keep things natural with super king-size mattresses made from natural fibres. From Latex foam that’s firmer than ordinary memory foam to luxurious fibres like cashmere, alpaca, silk and pure wool, natural fibres are hypoallergenic, long-lasting, and give you a gorgeously indulgent feeling for a better night’s sleep.

Size Imperial Metric
Cot Mattress 3'9" x 1'9" 120cm x 60cm
Cot Bed Mattress 4'6" x 2'3" 140cm x 70cm
Adjustable Small Single 2'6" x 6'6" 75cm x 200cm
Adjustable Single 3' x 6'6" 90cm x 200cm
Adjustable Small Double 4' x 6'6" 120cm x 200cm
Adjustable Double 4'6" x 6'6" 135cm x 200cm
Small Single 2'6" x 6'3" 75cm x 190cm
Single 3' x 6'3" 90cm x 190cm
Small Double 4' x 6'3" 120cm x 190cm
Double 4'6" x 6'3" 135cm x 190cm
King Size 5' x 6'6" 150cm x 200cm
Super King 6' x 6'6" 180cm x 200cm
European Small Single 2'8" x 6'6" 80cm x 200cm
European Single 3' x 6'6" 90cm x 200cm
European Double 4'7" x 6'6" 140cm x 200cm
European King Size 5'3" x 6'6" 160cm x 200cm

All mattress sizes given are approximate and stated sizes refer to the sleeping surface only. Mattresses sizes may vary slightly from their stated dimensions due to manufacturing tolerances, please allow +/- 2 inches (5cm).

Support Best for
 Icon for Memory Foam Memory Foam Body moulding and pressure relieving
 Icon for Natural Fibres Natural Fibres Unrivalled comfort, naturally temperature-regulating
 Icon for Latex Latex Breathable, supportive and eco friendly
 Icon for Cool Gel Memory Foam Cool Gel Memory Foam Active cooling properties, ideal for hot sleepers
 Icon for Soft White Fibres Soft White Fibres Hypoallergenic polyester, soft and durable

Support Best for
 Icon for Pocket Springs Pocket Springs Individual springs for tailored support
 Icon for Foam Foam Conforms to your body's shape, silent (no springs)
 Icon for Open Coil Springs Open Coil Springs Traditional, interlinked springs
 Icon for Pocket Springs Latex Bouncy yet supportive, great for hot sleepers

Firmness Best for
Good for side sleepers, a softer level of support
Good all-rounder for front, side or back sleepers
Medium - Firm
Good for people who change sleeping position
Good for people who sleep on their front or back
Extra Firm
The firmest level of support, also known as orthopaedic

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