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Up to 30% extra discount at checkout when you purchase today | Up to 30% extra discount at checkout when you purchase today | Up to 30% extra discount at checkout when you purchase today
Home › King Size Mattresses - 5ft Mattresses › Page 2

King Size Mattresses - 5ft Mattresses

Our king size mattresses measure 5ft wide and 6ft 6 inches long. King size mattresses are considerably larger than our double mattresses, making them ideal for couples who like to sprawl out in the bed or just like to get their own space when sleeping. From memory foam to pocket sprung, we offer a variety of 5ft king size mattresses to suit your preferences. Browse the full range of 5ft mattresses below.

  • Price: —

58 products

  • Nova Ortho Mattress

    Nova Ortho Mattress

    From £909 Original price was: £909.£727Current price is: £727.20.
  • Nova Balance Mattress

    Nova Balance Mattress

    From £747
    Order Now and Get by July 15, 2025
  • Rockford Mattress

    Rockford Mattress

    From £1150 Original price was: £1150.£805Current price is: £805.
    Order Now and Get by July 15, 2025
  • Ruby Mattress

    Ruby Mattress

    From £1230 Original price was: £1230.£861Current price is: £861.
    Order Now and Get by July 15, 2025
  • Gel Plush Comfort Mattress

    Gel Plush Comfort Mattress

    From £900
    Order Now and Get by July 4, 2025
  • Gel Plush Ortho Mattress

    Gel Plush Ortho Mattress

    From £936
    Order Now and Get by July 4, 2025
  • Hinton Mattress

    Hinton Mattress

    From £1360 Original price was: £1360.£952Current price is: £952.
    Order Now and Get by July 15, 2025
  • Deluxe Comfort Mattress

    Deluxe Comfort Mattress

    From £1425 Original price was: £1425.£998Current price is: £997.50.
    Order Now and Get by July 15, 2025
  • Aura Essence Mattress

    Aura Essence Mattress

    From £1029
  • Earth Care Mattress

    Earth Care Mattress

    From £1092
    Order Now and Get by July 29, 2025
  • Aura Support Mattress

    Aura Support Mattress

    From £1134
  • Bamboo Nurture 4000 Mattress

    Bamboo Nurture 4000 Mattress

    From £1167
    Order Now and Get by July 15, 2025
  • Deluxe Ortho Mattress

    Deluxe Ortho Mattress

    From £1710 Original price was: £1710.£1197Current price is: £1197.
    Order Now and Get by July 15, 2025
  • Aura Ortho Mattress

    Aura Ortho Mattress

    From £1239
  • Flora Care Mattress

    Flora Care Mattress

    From £1311
    Order Now and Get by July 29, 2025
  • Aura Cloud Mattress

    Aura Cloud Mattress

    From £1425
  • Ocean Care Mattress

    Ocean Care Mattress

    From £1458
    Order Now and Get by July 4, 2025
  • Bamboo Relaxation 6000 Mattress

    Bamboo Relaxation 6000 Mattress

    From £1494
    Order Now and Get by July 4, 2025
  • Kelmscott 4524 Mattress

    Kelmscott 4524 Mattress

    From £1524
    Order Now and Get by July 29, 2025
  • Deluxe Gel Mattress

    Deluxe Gel Mattress

    From £2185 Original price was: £2185.£1530Current price is: £1529.50.
    Order Now and Get by July 15, 2025
  • Deluxe Natural Mattress

    Deluxe Natural Mattress

    From £2185 Original price was: £2185.£1530Current price is: £1529.50.
    Order Now and Get by July 15, 2025
  • Forest Care Mattress

    Forest Care Mattress

    From £1626
    Order Now and Get by July 29, 2025
  • Wightwick 6024 Mattress

    Wightwick 6024 Mattress

    From £1785
    Order Now and Get by July 29, 2025
  • Bamboo Tranquility 8000 Mattress

    Bamboo Tranquility 8000 Mattress

    From £1818
    Order Now and Get by July 4, 2025

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What size is a king size mattress?

A king size mattress measures 5 feet wide (150cm) and 6ft 6 inches long (200cm), making it 6 inches wider and 3 inches longer than a regular double mattress. They are ideal for bedrooms with large floor spaces. The king size mattress comes in a variety of depths depending on the comfort level you choose and whether you opt for a pocket sprung, memory foam or hybrid mattress.

 

Are all king mattresses the same size?

Yes, all king size mattresses should measure 5ft x 6ft 6inches. If the mattress is smaller than this, it’s likely a double mattress. If the mattress is larger than this, it’s likely a super king size mattress, which measures 6ft x 6ft 6 inches.

Can a king size mattress fit on a double bed?

While a king size mattress can technically fit on top of a double bed frame, we strongly advise against it. The king size mattress is both longer and wider than a double bed frame, so the mattress will stick over the edge and will be unstable to sleep on. If you need a matching bed frame, we have a variety of king size frames and king size divan sets available.

What is a good king size mattress?

A good king size mattress is one that provides long lasting comfort and a good night’s sleep. This will be different for many people, depending on their preferences, body type and any health conditions.

 

Pocket sprung king size mattresses – Ideal for those who often wake up with an aching neck or back, pocket springs shape themselves around your body for maximum support. We offer pocket sprung mattresses with anywhere between 1,000 and 35,000 pocket springs. 

 

Memory foam king size mattresses – If you want your mattress to mould to the contours of your body, our memory foam king size mattresses do just that, returning to their original shape when you get off the bed.

 

Hybrid king size mattresses – Why not get the best of both worlds with a hybrid king size mattress which utilises memory foam technology to remember the shape of your body and pocket springs to provide ultimate support.

 

You’ll also want to consider how firm you need your mattress. We offer firmness gradings from 1 (soft) to 5 (extra firm) so that you can find the perfect king size mattress for you.

Buy 5ft mattresses and more with Sussex Beds

Browse our full range of king size mattresses online or check out our king size divan beds and king size divan bases. UK delivery, assembly service and disposal of existing furniture services available.

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Sussex Beds™ is a true independent family business and this is immediately obvious with its warm welcome & relaxed shopping experience. Our team are fully trained to guide you in finding a quality bed that meets your specific needs.

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