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      King Size Hypnos Mattresses

      Perfect for couples who want to spread out comfortably, or anyone who needs a bigger sleeping space with maximum support and a luxury feel, a Hypnos king size mattress is guaranteed to offer you a better night's sleep. The benefits of a Hypnos mattress are even more abundant when you choose a king size, letting you enjoy their World-renowned comfort and support on a larger level.

      14 results

      Read what our verified customers are saying

      • Trustpilot 5 stars

        Amazing

        Amazing, prompt on time delivery less than 24 hours after ordering and within the time window quoted. Excellent would highly recommend

        Andrew S
        23rd July 2026 Verified
      • Trustpilot 5 stars

        Excellent service

        Ordering in the afternoon and delivered free the next day was excellent and informed of delivery time which was accurate, two delivery men who were both polite and professional and mattresses both as described.

        Lorraine Grey
        23rd July 2026 Verified
      • Trustpilot 5 stars

        Great experience

        Easy transaction. Delivery guys were good communicators, prompt and efficient. Also careful with installation.

        Customer
        22nd July 2026 Verified
      • Trustpilot 5 stars

        Efficient, great communication, punctual and a great comfy mattress

        Great mattress, punctual delivery the very next morning, exceptional customer service and communication throughout, considerate and efficient delivery men, really deserving of a five star rating.

        Mrs Smith
        22nd July 2026 Verified
      • Trustpilot 5 stars

        Great service

        Ordered on a saturday afternoon, the mattress arrived sunday afternoon, the delivery guys took the mattress to the room and took away my old mattress, very affordable prices and a great prompt service, slept on the mattress now for 4 nights and have not got a bad back in the morning, would definitely recommend.

        Miss Mccullough
        22nd July 2026 Verified
      • Trustpilot 5 stars

        Amazing service

        Amazing! option of next day but chose a little later. Option to pay for am/ pm slot which I did. Also for old mattress recycling. Updates were great, day before and on day, appreciated the phone call when they were 30/40 mins away. No fault with delivery, wrappings taken. Only had 3 nights so far but much happier than with previous mattress. Good quality hypnos at a good price. Very impressed and would shop again.

        Marie
        22nd July 2026 Verified
      • Trustpilot 5 stars

        Happy customer

        Easy ordering and lots of updates about delivery. Delivery was on time and the two men very helpful carrying the mattresses inside.

        Mattress Buyer
        22nd July 2026 Verified
      • Trustpilot 5 stars

        Later then expected but roads busy

        Mattress was late for delivery by a few hours but I was kept informed by the driver,being a hot saturday the roads were very busy. Kind and cheerful delivery men . Brought the mattress up to the bedroom for me . Lovely comfortable one too. Thank you

        Marilyn Woollard
        22nd July 2026 Verified
      • Trustpilot 5 stars

        excellent

        Excellent, very fast service. We chose delivery 2 days after placing order, but we could've chosen next-day if we'd wanted. On delivery day we knew where the van was at all times so knew roughly when it was coming. Cannot fault the service, good price too.

        Jamie Nicol
        22nd July 2026 Verified
      • Trustpilot 5 stars

        Brilliant

        Brilliant. Arrived on time. Packed well and easy to unroll and put in place. Very comfortable mattress too.

        Mari
        22nd July 2026 Verified

      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 Ultimate Ortho 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 Aurora Deluxe 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 Pillow Top Select Mattress would be ideal, with its ActivePro™ 6-Turn Pocket Springs 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 long does a Hypnos King Size Mattress last?

      All Hypnos King Size Mattresses come with either a five-year or 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 buying guide hub also features multiple articles and buying guides to help you get the most out of your new mattress.