King Mattresses

Upgrade your sleep with our 5ft king size mattresses. Handcrafted for superior support and extra space, these 150cm mattresses are the perfect fit for master bedrooms.

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Sleepeezee ActivFlex Response 2600 Mattress
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Sleepeezee ActivFlex Response 2600 Mattress

★★★★★ 5 reviews
  • ✓ ActivFlex™ Spring Foam
  • ✓ Medium Support
  • ✓ Non Turn
  • ✓ Pillow Top
  • ✓ Staycool™ Gel
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£1,018.64 £1,498.00 Save £479.36
Medium
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Sleepeezee ActivFlex Response 1600 Mattress
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Sleepeezee ActivFlex Response 1600 Mattress

★★★★★ 5 reviews
  • ✓ ActivFlex™ Spring Foam
  • ✓ Firmer Support
  • ✓ Non Turn
  • ✓ Staycool™ Gel
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£950.64 £1,212.86 Save £262.22
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Sleepeezee Cool Refresh 3200 Mattress
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Sleepeezee Cool Refresh 3200 Mattress

★★★★★ 5 reviews
  • ✓ Added Side Support
  • ✓ Comfort Foam
  • ✓ Cool-Touch Surface
  • ✓ Medium/Soft support
  • ✓ Pillow Top
  • ✓ Staycool™ Gel
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£991.44 £1,458.00 Save £466.56
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Sleepeezee Cool Refresh 2300 Mattress
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Sleepeezee Cool Refresh 2300 Mattress

★★★★★ 5 reviews
  • ✓ Added Side Support
  • ✓ Cool-Touch Surface
  • ✓ Medium Support
  • ✓ Pillow Top
  • ✓ Staycool™ Gel
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£882.64 £1,284.29 Save £401.65
Medium
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Sleepeezee Cool Refresh 1600 Mattress
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Sleepeezee Cool Refresh 1600 Mattress

★★★★★ 5 reviews
  • ✓ Cool-Touch Surface
  • ✓ Firm/Extra Firm Support
  • ✓ Non Turn
  • ✓ Staycool™ Gel
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£787.44 £1,158.00 Save £370.56
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Sleepeezee Fusion Pro Mattress
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Sleepeezee Fusion Pro Mattress

★★★★★ 5 reviews
  • ✓ 800 Pocket Springs
  • ✓ Depth - 25cm
  • ✓ Encapsulated
  • ✓ Hypoallergenic
  • ✓ Memory Foam
  • ✓ Non Turn
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£746.64 £1,098.00 Save £351.36
Soft

You've viewed 61 of 61 king mattresses

A king-size mattress, measuring 150cm x 200cm (5ft), is widely regarded as the gold standard for a master bedroom. It offers a significant upgrade in both width and length compared to a Standard double, providing a more expansive sleeping area that is essential for couples who value an undisturbed night. The extra 15cm of width ensures that each person has more personal space, while the 200cm length offers much-needed legroom for taller sleepers.

Our collection of king size mattresses is handcrafted to provide an elite level of comfort. Whether you are looking for the responsive support of Pocket springs or the pressure-relieving qualities of a Hybrid mattress, our 5ft range is engineered to transform your bedroom into a true sanctuary.

Why choose a 5ft king size mattress

Enhanced comfort for couples

The primary benefit of moving to a king size is the reduction in partner disturbance.

Generous width: The 150cm width allows you to turn and find your perfect sleeping position without encroaching on your partner. This is a vital feature for light sleepers who are easily disturbed by movement.

Increased length: At 200cm long, a king size mattress is 10cm longer than a standard double. This makes it the ideal choice for anyone over six feet tall, as it prevents feet from hanging over the edge and allows for a more natural, relaxed posture.

Handcrafted for long-term support

A mattress of this scale requires expert construction to ensure it remains supportive across the entire surface.

Independent spring units: We utilise individually nested pocket springs that react precisely to your body weight. This prevents the "roll-together" effect and ensures that the mattress remains as supportive in the centre as it is at the edges.

Premium natural fillings: Many of our king size models feature deep layers of Wool and cotton. These natural materials are highly breathable, helping to regulate your temperature across the larger surface area.

Frequently Asked Questions

What size mattresses are available at Oliver & Sons?
We offer them in a variety of sizes to accommodate different bed frames and sleeping preferences. The available sizes typically include: Twin: Ideal for children's rooms, guest rooms, or small bedrooms where space is limited. The Twins measure approximately 38 inches wide and 75 inches long. Twin XL: Slightly longer than a standard twin mattress, twin XL are commonly used in college dormitories and for taller individuals. They measure approximately 38 inches wide and 80 inches long. Full/Double: Also known as double mattresses, provide more width than a twin mattress, making them suitable for single sleepers who prefer an extra room or for couples who like to snuggle. They measure approximately 54 inches wide and 75 inches long. Queen: Queen is one of the most popular mattress sizes, offering ample space for single sleepers or couples without taking up too much room in the bedroom. They measure approximately 60 inches wide and 80 inches long. King: King provides the most sleeping space, making them ideal for couples who want plenty of room to spread out or share with pets or children. They measure approximately 76 inches wide and 80 inches long. California King: California king mattresses are longer and narrower than standard king mattresses, making them suitable for taller individuals or those who prefer extra length. They measure approximately 72 inches wide and 84 inches long.
How do I choose the right mattress firmness?
Here are some factors to consider when determining the ideal firmness level for your mattress: Sleeping Position: Your preferred sleeping position can influence the ideal firmness level of your mattress. Body Weight: Your body weight can affect how much pressure you exert on the mattress and how deeply you sink into it. Personal Preference: Ultimately, the firmness level of your mattress should align with your personal comfort preferences. Some people prefer the plush feel of a softer mattress, while others prefer the firm support of a firmer mattress. Health Conditions: Certain health conditions, such as chronic pain or arthritis, may influence your choice of mattress firmness. In such cases, it's essential to consult with a healthcare professional for personalised recommendations.
Do mattresses come with a sleep trial?
Yes, typically they come with a sleep trial period, allowing you to try out the mattress in the comfort of your own home before making a final decision. During the sleep trial period, you have the opportunity to sleep on the mattress and determine if it meets your comfort and support needs. If, for any reason, you are not satisfied with the mattress during the sleep trial period, you may be eligible to return it for a full refund or exchange, subject to the terms and conditions of the sleep trial policy. This allows you to make an informed decision about your mattress purchase without the risk of being stuck with a mattress that doesn't meet your needs. It's essential to review the specific terms and duration of the sleep trial period for the mattress you are interested in, as these details may vary depending on the model and promotional offers available at the time of purchase. Additionally, be sure to follow any instructions regarding the return process to ensure a smooth and hassle-free experience.
How do I care for my mattress?
Here are some general care and maintenance tips: Use a Mattress Protector: Consider using a mattress protector to help prevent spills, stains, and dust mites from penetrating the mattress. A waterproof or water-resistant mattress protector can provide an additional layer of protection against accidents and spills. Keep the Mattress Clean: Vacuum your mattress periodically to remove dust, debris, and allergens that can accumulate over time. Use a handheld vacuum with an upholstery attachment to gently vacuum the surface of the mattress. Spot Clean Stains: If spills or stains occur, spot clean the affected area immediately with a mild detergent and water. Blot the stain with a clean cloth or sponge, taking care not to saturate the mattress. Allow the mattress to air dry thoroughly before replacing the bedding. By following these care and maintenance tips, you can help prolong the life of your mattress and enjoy a comfortable and supportive sleep surface for years to come.
Are mattresses compatible with adjustable bed frames?
Yes, many are compatible with adjustable bed frames, allowing you to customise your sleep position for optimal comfort and support. Adjustable bed frames, also known as power bases or adjustable bases, allow you to elevate or recline different parts of the mattress to achieve your desired sleeping position. When using a mattress with an adjustable bed frame, it's essential to follow any guidelines or recommendations provided by the mattress manufacturer to ensure proper support and functionality. Additionally, be sure to check the warranty terms and conditions to confirm that using the mattress with an adjustable bed frame does not void the warranty coverage. For more Details Read out our Mattress Guide.
Will a king size mattress fit on my current double bed frame?
No, a king size mattress is 150cm wide and 200cm long, which is larger than a standard 135cm x 190cm double frame. You will need a specific King size bed frame or a 5ft divan base to accommodate this mattress size.
How do I know if a king size bed will fit in my room?
We recommend measuring your bedroom to ensure you have at least 60cm of walking space around the three sides of the bed. It is also worth checking the access to your bedroom, as 5ft mattresses are substantial and require a clear path through hallways and door frames.
What tension is best for a king size mattress?
The choice of tension depends on your weight and sleeping style. A Medium firm or Medium mattress is usually the most popular choice for couples as it provides a balanced compromise. However, if you require extra spinal support, our Orthopaedic king size mattresses are an excellent alternative.
How do I maintain my 5ft mattress?
To ensure even wear of the comfort layers, you should rotate your mattress from head to toe every few months. Most of our modern king size mattresses are designed to be single-sided for your convenience, meaning you only need to rotate them rather than flipping them over.