King Size Mattresses

Explore king size mattresses made for family bedrooms or growing children. Spacious, supportive and crafted for lasting comfort and quality.

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Early Black Friday sale
Orthopedic Memory Foam Spring MattressOrthopedic Memory Foam Spring Mattress
Delivery Before: 17 November
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Orthopedic Memory Foam Spring Mattress

88 reviews

  • Contours body for pressure relief
  • Individually wrapped supportive springs
  • Medium-firm breathable comfort
Regular price £199.00 Sale price From £64.99
You Save: £134.01
Early Black Friday sale
Air Feel Orthopedic Mattress - Memory Foam and Spring Mattress | Pefect Ergonomical Sleeping PositionAir Feel Orthopedic Mattress - Memory Foam and Spring Mattress | Pefect Ergonomical Sleeping Position
Delivery Before: 17 November
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Air Feel Orthopedic Mattress - Memory Foam and Spring Mattress | Pefect Ergonomical Sleeping Position

15 reviews

  • Memory foam contours body
  • Individually wrapped spring support
  • Breathable skin-friendly fabric
Regular price £202.00 Sale price From £64.99
You Save: £137.01
Early Black Friday sale
Hydro Memory Foam Spring MattressHydro Memory Foam Spring Mattress
Delivery Before: 17 November
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Hydro Memory Foam Spring Mattress

5 reviews

  • Hybrid foam springs
  • Spine-conforming comfort
  • Breathable memory foam
Regular price £177.00 Sale price From £64.99
You Save: £112.01
Early Black Friday sale
Certified Therma-Pure Memory Foam Mattress with Reflex Foam - 7 Zone- Medium FirmCertified Therma-Pure Memory Foam Mattress with Reflex Foam - 7 Zone- Medium Firm
Delivery Before: 17 November
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Certified Therma-Pure Memory Foam Mattress with Reflex Foam - 7 Zone- Medium Firm

  • Memory foam comfort
  • 7 zone support
  • Soft knitted cover
Regular price £188.00 Sale price From £86.99
You Save: £101.01
5 Years Warranty
BedzOnline Hydro Pocket Spring Memory MattressBedzOnline Hydro Pocket Spring Memory Mattress
Delivery Before: 17 November
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BedzOnline Hydro Pocket Spring Memory Mattress

4 reviews

  • 1,000 pocket springs
  • High-density memory foam
  • Soft knitted cashmere
Regular price £420.00 Sale price From £89.99
You Save: £330.01
5 Years Warranty
BedzOnline Premium Hybrid Pocket Sprung Memory MattressBedzOnline Premium Hybrid Pocket Sprung Memory Mattress
Delivery Before: 17 November
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BedzOnline Premium Hybrid Pocket Sprung Memory Mattress

1 reviews

  • Memory foam
  • Pressure relief
  • Wrapped coils
Sale price From £91.99
5 Years Warranty
BedzOnline Pocket Spring Mattress Full Body SupportBedzOnline Pocket Spring Mattress Full Body Support
Delivery Before: 17 November
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BedzOnline Pocket Spring Mattress Full Body Support

  • Breathable cover
  • Protective fibre
  • Cool sleep
Sale price From £84.99
5 Years Warranty
BedzOnline Hybrid - Maxi Cool Prime Individually Pocket Mattress With Memory FoamBedzOnline Hybrid - Maxi Cool Prime Individually Pocket Mattress With Memory Foam
Delivery Before: 17 November
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BedzOnline Hybrid - Maxi Cool Prime Individually Pocket Mattress With Memory Foam

  • 5-zone pocket springs
  • Edge support
  • Breathable cover
Sale price From £129.99
5 Years Warranty
BedzOnline Box Top Premium Tranquility MattressBedzOnline Box Top Premium Tranquility Mattress
Delivery Before: 17 November
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BedzOnline Box Top Premium Tranquility Mattress

  • Wrapped springs
  • Breathable hypo foam
  • Absorbs motion
Sale price From £91.99
New & Trending
Diamond Memory Coil MattressDiamond Memory Coil Mattress
Delivery Before: 17 November
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Diamond Memory Coil Mattress

  • Premium spring
  • Double comfort filling
  • Cool touch surface
Sale price From £74.45
5 Years Warranty
BedzOnline Pocket Sprung Mattress Double with Breathable Foam and Individually Pocket Spring - MediumBedzOnline Pocket Sprung Mattress Double with Breathable Foam and Individually Pocket Spring - Medium
Delivery Before: 17 November
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BedzOnline Pocket Sprung Mattress Double with Breathable Foam and Individually Pocket Spring - Medium

  • Pocket springs
  • Memory foam
  • Breathable cover
Sale price From £91.99
5 Years Warranty
BedzOnline Memory Foam Mattress Pocket Sprung Mattress with 3D Breathable Knitted Fabric and Airy MeshBedzOnline Memory Foam Mattress Pocket Sprung Mattress with 3D Breathable Knitted Fabric and Airy Mesh
Delivery Before: 17 November
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BedzOnline Memory Foam Mattress Pocket Sprung Mattress with 3D Breathable Knitted Fabric and Airy Mesh

  • Wave memory foam
  • Pocket coil support
  • Soft breathable cover
Sale price From £91.99

King size mattresses deliver extra space and comfort that make a noticeable difference in how you and your child sleep. This collection features strong mattress cores, breathable covers and build quality designed to last through years of use. The generous surface area gives everyone room to stretch out, relax and enjoy a calm night. Whether you’re upgrading a child’s bed or choosing a mattress for a shared room, these options offer serious value and comfort.

With finishes that are easy to care for, materials chosen for durability and designs that fit modern homes, you can match this size to both your space and your lifestyle. You’ll find a variety of support levels, including firmer and plush-feel styles, so the mattress works for your child’s needs now and into their teenage years. Take your time comparing the collection and select a mattress that supports restful sleep, everyday use and a home that keeps pace with your family.

Frequently Asked Questions
The standard thickness of a kids' mattress is six to twelve inches. Because of their interior coil construction, hybrid and coil.
The standard dimensions of a toddler bed are about 140 cm in length and 70 cm in width, whereas the dimensions of a single bed are typically 190 cm in length and 90 cm in breadth.
The size of the bed depends on your child's age, the size of the bedroom, and future growth. Toddler beds are suitable for young children transitioning from cribs, while twin or full-size beds are more appropriate for older children or teenagers.
Standard Delivery is £5.99 for the UK Mainland. Next Working Day Delivery is £5.99 for in-stock items. Northern Ireland Delivery is £19.95.
We cannot amend the delivery address once your order has been processed and dispatched.