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A king size mattress fits a king size bed frame, but mattress size refers only to width and length, not thickness or material. Therefore, you have many options to choose from. For example, consider conventional inner spring, memory foam or air mattress styles.

A king size mattress might feature a pillow top of varying thickness, or none. Choose the mattress you like in the right size, then choose the sheets to fit, and enjoy a fine night's sleep.

  • LEATHER BED-DOUBLE KING-BLACK-BROWN-WHITE With MEMORY FOAM-ORTHOPAEDIC MATTRESS

    LEATHER BED-DOUBLE KING-BLACK-BROWN-WHITE With MEMORY FOAM-ORTHOPAEDIC MATTRESS

    3 Variants of Mattress FREE DELIVERY*
    £171.47
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    • 1887+ watching
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    • 761+ sold
    Orthopaedic or memory foam mattress. Mattress Information:This is a beautifully handcrafted mattress that is medium and offers support and comfort to those of us with back concerns.
  • kingsize bed with mattress

    kingsize bed with mattress

    £21.00
    2 bids
    • 13 watching
    The mattress is a Spencer pocket sprung mattress (made in the U.K.). This is for a King size Bed, including mattress headboard. The bed is approximately one year old and is in a very good clean condit...
  • 3ft,4ft,4ft6,5ft Standard or Ottoman Storage Bed Black Brown White with Mattress

    3ft,4ft,4ft6,5ft Standard or Ottoman Storage Bed Black Brown White with Mattress

    ****PLEASE CHOOSE STORAGE or STANDARD****
    £194.74
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    New Faux Leather Bed 3ft 4ft 4ft6 5ft Black Brown White Taupe + Mattress Option. 4ft6 Double. Takes standard UK mattress Size: 4ft6 Double: W135cm x L190cm.
  • king size bed with mattress

    king size bed with mattress

    £109.00
    14 bids
    + £0.00 P&P
    • 28 watching
    Brown leather king size bed with hydraulic lift for full underneath storage and Octospring mattress. Only 8 months old for sale due to relocating overseas 
  • LEATHER BED DOUBLE KING BLACK BROWN WHITE WITH MEMORY FOAM-ORTHOPAEDIC MATTRESS

    LEATHER BED DOUBLE KING BLACK BROWN WHITE WITH MEMORY FOAM-ORTHOPAEDIC MATTRESS

    AVAILABLE IN 3 COLOURS, FREE NEXT DAY DELIVERY !!!
    £159.99
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    • 242+ watching
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    • 128+ sold
    The Orthopaedic mattress as shown in picture 6 has a 13.5 open coil spring unit approximately 10" thick with a layer of high density reflex foam cover ed in a damask fabric. Orthopedic.
  • BRAND NEW 3FT SINGLE 4FT6 DOUBLE 5FT KING MEMORY/ ORTHOPAEDIC FOAM  MATTRESS 10

    BRAND NEW 3FT SINGLE 4FT6 DOUBLE 5FT KING MEMORY/ ORTHOPAEDIC FOAM MATTRESS 10"

    £87.39
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    • 313+ watching
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    • 206+ sold
    3ft single, double 4ft6" 5 ft memoryfoam mattress. Orthopaedic sprung this is a sprung mattress with a orthopaedic top. Orthopaedic foamthis is a orthopaedic foam mattress with reflex all plain cover....
  • king size orthopaedic memory foam mattress

    king size orthopaedic memory foam mattress

    £31.00
    5 bids
    • 35 watching
    We bought the mattress one month ago but unfortunately my hubby doesn't like it, so we have gone back to our old mattress. It is memory foam one side and can be used purely as an orthopedic mattress i...
  • 3FTSINGLE 4FT6 DOUBLE 5FT KING MEMORY FOAM MATTRESS 10

    3FTSINGLE 4FT6 DOUBLE 5FT KING MEMORY FOAM MATTRESS 10"

    FREE NEXT DAY DEL !
    £91.49
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    Free P&P
    • 6039+ watching
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    • 7984+ sold
    3ft single, double 4ft6" 5 ft memoryfoam mattress. MATTRESS FEATURES standard uk sizes 3ft 4ft6 and 5ft. 25CM (10"approx) OVERALL MATTRESS DEPTH. Promotes good blood circulation quilted mattress in a ...
  • SILENTNIGHT 3 ZONE KING SIZE MEMORY FOAM MATTRESS

    SILENTNIGHT 3 ZONE KING SIZE MEMORY FOAM MATTRESS

    £65.00
    8 bids
    + £18.00 P&P
    • 16 watching
    Full size mattress: Full size mattress suitable for Bedstead and Divan style bases. Quality memory foam mattress with miratex 3 zoned support system.
  • NEW 3FTSINGLE 4FT6 DOUBLE 5FT KING MEMORY FOAM MATTRESS 10

    NEW 3FTSINGLE 4FT6 DOUBLE 5FT KING MEMORY FOAM MATTRESS 10"

    £91.99
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    Free P&P
    • 459+ watching
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    • 334+ sold
    3ft single, double 4ft6" 5 ft memoryfoam mattress. MATTRESS FEATURES standard uk sizes 3ft 4ft6 and 5ft. 25CM (10"approx) OVERALL MATTRESS DEPTH. Promotes good blood circulation quilted mattress in a ...

About King Size Mattresses

Measuring a spacious 5ft by 6.6ft, king size mattresses are a great choice for a master bedroom or luxurious guest room. The king size option is 6 inches wider and 3 inches longer than a standard double, making it perfect for those who like a spacious sleeping area. When buying a mattress for your bed, it pays to become familiar with the wide variety of types available. The most basic design is open coil. These budget-friendly mattresses are constructed from separate springs which are joined together to create a base. Continuous coil mattresses are similar, but are created from a single length of wire. Both of these are a good choice if you are looking for an economical mattress, but will have less support and durability than the more expensive options. Pocket sprung mattresses feature a bed of springs which are sewn into individual pockets. This provides additional support and comfort, and reduces the 'roll together' effect that some cheaper mattresses cause. All sprung mattresses have a layer of material over the springs to provide comfort. This can be made from natural materials, such as wool and cotton, which will help to keep you cool and comfortable by wicking away perspiration. Man made products, such as latex, are perfect for people who suffer from allergies and offer a practical, durable option. Memory foam has become a popular choice for the top layer, as the material is designed to react to body heat and create a unique supportive base. Solid foam mattresses without springs are an low cost alternative, and are often available with a top layer of memory foam for added comfort. These mattresses offer reduced support, and tend to be more comfortable for small adults and children.