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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Spring Sale
Orthopedic Memory Foam Spring MattressOrthopedic Memory Foam Spring Mattress
Delivery By: 12 June
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Orthopedic Memory Foam Spring Mattress

120 reviews

  • Contours body for pressure relief
  • Individually wrapped supportive springs
  • Medium breathable comfort
Regular price £198.92 Sale price From £66.26
You Save: £132.66
Medium
Spring 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 By: 12 June
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Air Feel Orthopedic Mattress - Memory Foam and Spring Mattress | Pefect Ergonomical Sleeping Position

20 reviews

  • Memory foam contours body
  • Individually wrapped spring support
  • Breathable skin-friendly fabric
Regular price £201.91 Sale price From £54.99
You Save: £146.92
Medium
Spring Sale
Hydro Memory Foam Spring MattressHydro Memory Foam Spring Mattress
Delivery By: 12 June
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Hydro Memory Foam Spring Mattress

9 reviews

  • Hybrid foam springs
  • Spine-conforming comfort
  • Breathable memory foam
Regular price £176.92 Sale price From £54.99
You Save: £121.93
Medium Firm
5 Years Warranty
BedzOnline Hydro Pocket Spring Memory MattressBedzOnline Hydro Pocket Spring Memory Mattress
Delivery By: 12 June
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BedzOnline Hydro Pocket Spring Memory Mattress

5 reviews

  • 1,000 pocket springs
  • High-density memory foam
  • Soft knitted cashmere
Regular price £164.90 Sale price From £89.95
You Save: £74.95
Medium Firm
Spring 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 By: 12 June
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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 £187.92 Sale price From £99.99
You Save: £87.93
Medium
5 Years Warranty
BedzOnline Pocket Spring Mattress Full Body SupportBedzOnline Pocket Spring Mattress Full Body Support
Delivery By: 12 June
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BedzOnline Pocket Spring Mattress Full Body Support

  • Breathable cover
  • Protective fibre
  • Cool sleep
Sale price From £84.95
Medium Firm
5 Years Warranty
BedzOnline Premium Hybrid Pocket Sprung Memory MattressBedzOnline Premium Hybrid Pocket Sprung Memory Mattress
Delivery By: 12 June
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BedzOnline Premium Hybrid Pocket Sprung Memory Mattress

1 reviews

  • Memory foam
  • Pressure relief
  • Wrapped coils
Sale price From £91.95
Firm
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 By: 12 June
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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 £164.99
Firm
5 Years Warranty
BedzOnline Box Top Premium Tranquility MattressBedzOnline Box Top Premium Tranquility Mattress
Delivery By: 12 June
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BedzOnline Box Top Premium Tranquility Mattress

  • Wrapped springs
  • Breathable hypo foam
  • Absorbs motion
Sale price From £91.95
Firm
5 Years Warranty
BedzOnline 9 Zone Therma Pure Premium Hybrid Memory Foam MattressBedzOnline 9 Zone Therma Pure Premium Hybrid Memory Foam Mattress
Delivery By: 12 June
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BedzOnline 9 Zone Therma Pure Premium Hybrid Memory Foam Mattress

  • Pocket springs support
  • Mesh sides cool
  • Zoned coils comfort
Sale price From £149.99
Medium Firm
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 By: 12 June
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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 £91.95
Firm
New & Trending
BEDZONLINE Pocket Sprung Mattress - Thick Medium Firmness Sleep SupportBEDZONLINE Pocket Sprung Mattress - Thick Medium Firmness Sleep Support
Delivery By: 12 June
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BEDZONLINE Pocket Sprung Mattress - Thick Medium Firmness Sleep Support

No reviews

  • 1000 pocket springs
  • Orthopaedic pressure relief
  • Hypoallergenic breathable cover
Sale price From £143.51
Medium Firm

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. Mattresses Standard Delivery Charges are £9.99
We cannot amend the delivery address once your order has been processed and dispatched.