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Kingsize Hypnos Mattresses

Sometimes bigger really is better! Perfect for couples who want to spread out, don’t want to fight for space, or simply if you’re a bit taller or wider and want to feel as comfortable as possible. You don’t have to worry too much about whether your bedroom is big enough for a king size mattress - as long as there’s room either side for you to climb in and out, the benefits of having a king size bed - especially with a Hypnos King Size Mattress - will be worth it.

28 results


Trustpilot Star rating

Based on 22,224 reviews

Trustpilot Star rating Verified

Ordered sunday night,delivered monday afternoon.Super comfy mattress.Would use again in a heart beat.

Mark St 18th Apr
Trustpilot Star rating Verified

Good selection of mattress for all size and firmness and price points with option to take old mattress away a little pricey maybe but usefull and a varied delivery time slots to suit. Have used several times and will continue to do so

Gary 18th Apr
Trustpilot Star rating Verified

Sunday delivery was an option which really worked for me and was free, which was a bonus. The communication was really good and they turned up on time. The guys were in and out in 5 mins. The mattress is sooo comfortable and really good value.

Christine 18th Apr

What makes Hypnos King Size Mattresses so popular?

Hypnos mattresses are renowned for their amazing comfort - crafted using the finest materials using traditional techniques such as hand-tufting, their king size mattresses truly are fit for royalty. These manufacturing processes are combined with the best quality materials, such as pure new wool, as well as innovative and exclusive eOlus sustainable fibres. Why not get the most of these intelligent features by opting for a larger style of this superior mattress?

Handcrafted in Buckinghamshire, UK, by a family firm with generations of bed and mattress making experience, Hypnos King Size Mattresses are not only one of the highest rated by happy customers, but are proud Royal Warrant holders. Get that holiday feeling every night when you stretch out on a Hypnos King Size Mattress - plus with our free next day delivery, you can upgrade your sleep to a 5 star hotel standard sooner than you’d think.

ReActive innovation at the core of every mattress

Hypnos may use traditional methods, but they're at the forefront of innovation in mattress design with their clever range of ReActive Pocket Spring engineered to provide supreme support. The greater the number of spring turns, the greater the springs ability to respond to movement and react with the level of support and comfort required by the user.

Pocket springs reduce movement within the mattress to give outstanding comfort whether you're sleeping on your own or with a partner, and provide complete edge-to-edge support.

What is the best Hypnos King Size Mattress for me?

Whichever one you choose, we know you’ll simply adore your Hypnos King Size Mattress. At MattressNextDay, we've introduced a range of Hypnos King Size Mattresses into our collection. There are many factors to consider when searching for the right mattress for you, but we know that there’s a Hypnos mattress for everyone - from gloriously comfy and cosy Hypnos Pillow Top mattresses to firmer options, your ideal king size mattress is here.

What option is best for my sleeping position?

Best Hypnos King Size Mattress for back sleepers

Back sleepers need a higher level of support to keep their back aligned. We recommend a firm to medium-firm mattress with pocket springs, such as the Hypnos Orthos Origins 7 Mattress, which also features higher tension springs at each edge, so you can enjoy extra support at every inch of your king size mattress.

Best Hypnos King Size Mattress for side sleepers

If you tend to sleep on your side, you’ll benefit from more cushioning for your hips and shoulders. We recommend a softer mattress such as the Hypnos Pillow Top Astral Mattress, with a 31cm depth and both wool and cotton fillings to alleviate pressure on your body.

Best Hypnos King Size Mattress for front sleepers

Front sleepers do need cushioning, but less than a side sleeper does. A balance between support and comfort is important. Something like the medium-firm Hypnos Elite Luxury Mattress would be ideal, with its ReActive™ 7-Turn Pocket Spring System providing total spinal and body support.

Hypnos King Size Mattresses are also available in Zip & Link, meaning that you and your partner can have your individual sleep needs met, while both enjoying the space and luxury of a king size.

How big is a Hypnos King Size Mattress?

A Hypnos King Size Mattress is the perfect measurement if you’re looking for some extra wiggle room without taking up too much space in your bedroom. While double mattresses are the most popular size choice, a king size mattress adds some luxury to bedtime, coinciding perfectly with the Hypnos name.

Mattress SizeMeasurements

Small Single Mattress

2'6" x 6'3" / 75cm x 190cm

Single Mattress

3' x 6'3" / 90cm x 190cm

Small Double Mattress

4' x 6'3" / 120cm x 190cm

Double Mattress

4'6" x 6'3" / 135cm x 190cm

King Size Mattress

5' x 6'6" / 150cm x 200cm

Super King Mattress

6' x 6'6" / 180cm x 200cm

How much does a Hypnos King Size Mattress cost?

A Hypnos King Size Mattress - along with any in the Hypnos range - is an investment you won’t regret. Long lasting and innovatively developed to offer you the highest level of luxury when it comes to sleep, a Hypnos King Size Mattress pays for itself. Starting at under £500 for the Hypnos Elite Deluxe Mattress and ranging in price up to £1679 for the ultimate Hypnos Pillow Top Celestial Mattress, you can see that there’s a Hypnos King Size Mattress for every budget.

Plus, with our huge discounts, frequent sales and award-winning free delivery service, you’re sure to get the best value from us.

How long does a Hypnos King Size Mattress last?

All Hypnos King Size Mattresses come with a ten-year guarantee, although as with any new mattress, how long it lasts will depend on several factors, including the size of the sleepers and how frequently the mattress is rotated. To ensure it stays feeling comfortable for as long as possible, you should rotate your Hypnos King Size Mattress at least every six months. Hypnos uses natural fibres which will naturally settle to suit your sleeping position over time.

For more information about Hypnos, check out our hypnos mattress buying guide. Our advice hub also features multiple articles and buying guides to help you get the most out of your new mattress.

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