Super King Mattresses

What size is a super king size mattress?

A super king size mattress is 180 cm wide and 200 cm long. It is the biggest mattress we make and is bigger than our king size mattress. You can find all the mattress sizes in our handy mattress size guide.
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Indulge In a Silentnight Super King Size Mattress

Searching for a sensational mattress that provides both luxury and total comfort? Our Silentnight Super king mattress range will offer you a night of all-encompassing relaxation. As the UK’s leading sleep experts, we are dedicated to providing the perfect solutions to common sleep disturbances, therefore, our Silentnight Super king size mattresses are designed with you in mind.

We understand that no two people are the same; because our bodies come in a wide variety of shapes and sizes, hence, the support we need whilst sleeping can differ dramatically. Getting a perfect night’s sleep lies in the comfort filling of you Silentnight Super king size mattress; we utilise targeted support and pressure-relieving fillings to create the perfect solutions for perfect sleep.

The Benefits of a Silentnight Super king Size Mattress

If you’re frequently kept awake with common sleep disturbances, then our exclusive Mirapocket Super king Size mattress is ideal for infinite relaxation. Offering paramount comfort, each Mirapocket mattress houses individual springs in separate pockets, allowing for even weight distribution, targeted support and luxurious comfort throughout the night - making this Silentnight Super king size mattress ideal for getting a great night’s sleep.

At Silentnight we are committed to providing you with a sumptuous night’s sleep. Our memory foam Super king size mattresses effectively absorb your weight evenly. Molding to the contours of your body, this mattress will provide tailored comfort and pressure relief; allowing for total relaxation and sleep satisfaction.

Indulge in a Silentnight Super king size mattress; it’s the answer to you sleep concerns. Once you’ve chosen your uniquely tailored Super King Size mattress, we will deliver it for FREE to any location in the UK, so you can have a heavenly sleep sooner rather than later.

Free UK Delivery

Our standard 2 Man Delivery Service (Mattresses & Divans)

  • Free UK delivery* to your room of choice throughout England, Scotland and Wales.
  • We provide a free professional two man delivery service that will deliver your purchases to your room of choice.
  • This service includes the set up of your bed or mattress in your chosen room, plus the removal and takeaway of the packaging.
  • We deliver most items Monday to Friday, 9am - 6pm.
  • On average products are delivered within 7 - 14 days.
  • *Some restrictions apply, please visit our delivery information for more detail.

Next Day Delivery Service (Mattresses/Bedframes)

  • Free Next Day Delivery, via a courier, to the door only.
  • A card will be left, with a contact number to call for re-delivery, if there is no one in.
  • Delivery will be between 8am - 7pm - Monday to Friday for Mattress-Now products
  • If ordered with another item, the Next Day Delivery will be delivered first, usual delivery terms apply for additional items (this may incur 2 deliveries)

60 night comfort trial

We're so confident that our beds and mattresses will provide you with a great night's sleep that we offer the security of the very best in terms of comfort guarantee.

  • At Silentnight we want to be sure that you are satisfied with the comfort of your new bed or mattress which is why we offer a total peace of mind 60 night comfort guarantee. If for any reason you are not totally satisfied we will exchange your purchased bed or mattress for an alternative Silentnight bed or mattress of your choice.
  • We do however ask that you try your new bed for at least four weeks for your body to adjust to your new bed or mattress.
  • For full terms and conditions, please click here for further details.

Total Quality Assurance

Before it gets to you your bed has been through a lot

  • All our mattresses, upholstered bases and headboards are made in the UK
  • All of our product meet European standards and exceed British standards
  • All our Upholstered beds and mattresses ordered through Shop.Silentnight are made to order
  • This means they are not stored for prolonged periods of time and are shipped to you direct from our factory.


  • Accredited onsite laboratory to bring the best products to you
  • Every Silentnight mattress type is tested to ensure it exceeds all British standards
  • Silentnight products are fully certified by the Forest Stewardship Council®(FSC®) FSC-C104461
  • We are full members of the Furniture Industry Sustainability Program.
Superbrands The Sleep Council nbf approved