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King Size Mattresses

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  1. Infinity 5000 Mattress

    Infinity 8000 Hybrid King Size Mattress

    £1,599.95

    And relax. King Size hybrid mattress featuring cutting edge TrueGel grid and TrueAir layers and 3000 pocket springs for a sumptuous, supportive nights sleep, every night. LIFE TIME guarantee is testament to the skilled workmanship and high quality materials that create this truly premium mattress. FREE Express Delivery. See More
    availability
    7
  2. Kaymed Therma Phase Paradise 2500

    Kaymed Therma Phase Ultra Paradise 2500 King Size Mattress

    £1,599.00

    The extra deep Kaymed Paradise 2500 king size mattress features a 2500 density pocket spring core with reinforced edge topped with 7.5cm of phase change technology gel. The ultimate temperature regulating, body contouring, pressure relieving substance on the market. Deep, substantial luxury support. Free express delivery. See More
    availability
    7.8
  3. Infinity 5000 Mattress

    Infinity 6000 Hybrid King Size Mattress

    £1,499.95

    And relax. King Size hybrid mattress featuring cutting edge TrueGel grid and TrueAir layers and 1000 pocket springs for the very best nights sleep, every night. LIFE TIME guarantee is testament to the skilled workmanship and high quality materials that create this truly premium mattress. FREE Express Delivery. See More
    availability
    7
  4. Sleep Naturally Latex Element 5800 Mattress

    Sleep Naturally Latex Element 5800 King Size Mattress

    £1,449.95

    5800 pocket spring count king size mattress with natural fillings including a wonderful latex layer. Two sided for a deep, medium to firm feel and a cool, responsive nights sleep. FREE Express Delivery. See More
    availability
    7.5
  5. Infinity 5000 Mattress

    Infinity 5000 Medium King Size Mattress

    £1,299.95

    And relax. King Size foam mattress featuring cutting edge TrueGel grid and TrueAir layers for the very best nights sleep, every night. LIFE TIME guarantee is testament to the skilled workmanship and high quality materials that create this truly premium mattress. FREE Express Delivery. See More
    availability
    7.5
  6. Infinity 5000 Mattress

    Infinity 5000 Medium/Firm King Size Mattress

    £1,299.95

    And relax. King Size foam mattress featuring cutting edge TrueGel grid and TrueAir layers for the very best nights sleep, every night. Medium/firm feel if that's what you like. LIFE TIME guarantee is testament to the skilled workmanship and high quality materials that create this truly premium mattress. FREE Express Delivery. See More
    availability
    8
  7. Kaymed Therma Phase Paradise 2000

    Kaymed Therma Phase Ultra Paradise 2000 King Size Mattress

    £1,299.00

    The Kaymed Paradise 2000 king size mattress features a 2000 density pocket spring core with reinforced edge topped with 5cm of phase change technology gel. The ultimate temperature regulating, body contouring, pressure relieving substance on the market. Deep, medium firmness luxury support. Free express delivery. See More
    availability
    7.5
  8. Nectar Hybrid Luxe Mattress

    Nectar Hybrid Luxe King Size Mattress

    £1,249.95

    The pinnacle of quality sleep. Hybrid mattress engineered from decades of innovation and sleep data. This ten-layer king size mattress design blends natural fibres with Nectar Smart™, Nectatex™, and Nectacoil™ for unmatched comfort and support. Experience superior, market-leading luxury sleep. Medium comfort level. FREE Express Delivery. See More
    availability
    7.5
  9. Kaymed Therma Phase Paradise 1600

    Kaymed Therma Phase Ultra Paradise 1600 King Size Mattress

    £1,199.00

    The Kaymed Paradise 1600 king size mattress features a 1600 density pocket spring core with reinforced edge topped with 5cm of phase change technology gel. The ultimate temperature regulating, body contouring, pressure relieving substance on the market. Deep, sink in luxury support. Free express delivery. See More
    availability
    6.8
  10. Silentnight Quantum 3000 Mattress

    Silentnight Quantum 3000 Softer Feel Pocket Geltex King Size Mattress

    £1,179.95

    A king size mattress for the best sleeping experience around. 3000 pocket springs with a responsive Geltex Inside comfort layer for cool, softer feel, supportive sleep year after year. FREE Express Delivery. See More
    availability
    6.5
  11. Silentnight Quantum 3000 Mattress

    Silentnight Quantum 3000 Medium Feel Pocket Geltex King Size Mattress

    £1,179.95

    A king size mattress for the best sleeping experience around. 3000 pocket springs with a responsive Geltex Inside comfort layer for a cool, medium feel, supportive sleep year after year. FREE Express Delivery. See More
    availability
    7.5
  12. Silentnight Quantum 3000 Mattress

    Silentnight Quantum 3000 Firmer Feel Pocket Geltex King Size Mattress

    £1,179.95

    A king size mattress for the best sleeping experience around. 3000 pocket springs with a responsive Geltex Inside comfort layer for a cool, firmer feel, supportive sleep year after year. FREE Express Delivery. See More
    availability
    7.9
  13. Nectar Hybrid Pro Mattress

    Nectar Hybrid Pro King Size Mattress

    £1,099.95

    Designed for those who demand the best in sleep, this eight-layer king size mattress combines Nectatex™ and Nectar Smart™ foam with Nectacoil™ HD and XL springs for adaptive support, breathability, and a copper infused cover. Experience superior comfort and a refreshing, rejuvenating sleep. Medium comfort level. FREE Express Delivery. See More
    availability
    7.5
  14. Kaymed Therma Phase Paradise 1200

    Kaymed Therma Phase Ultra Paradise 1200 King Size Mattress

    £1,099.00

    The Kaymed Paradise 1200 king size mattress features a 1200 density pocket spring core with reinforced edge topped with 5cm of phase change technology gel. The ultimate temperature regulating, body contouring, pressure relieving substance on the market. Deep, firm support. Free express delivery. See More
    availability
    8
  15. Sleep Naturally Celeste 3000 Mattress

    Sleep Naturally Celeste 3000 King Size Mattress

    £1,049.95

    Soft, weightless support from this luxury 3000 pocket spring king size mattress. Hand laid wool, cashmere, silk and cotton fillings cushion, support and ventilate. Hand side stitching, concealed tufting create the ultimate non turn premium mattress. FREE Express Delivery. See More
    availability
    5.5
  16. Millbrook Sublime 2500 Mattress

    Millbrook Sublime 2500 King Size Mattress

    £1,049.95

    Millbrook Smooth Tech technology creates a smooth tuft free finish for a luxurious, medium feel 2500 pocket sprung king size mattress. 1000 full size pocket springs combine with a layer of 1500 micro pocket springs. English cotton, Hampshire wool, silk and cashgora create a luxurious, non turn mattress. Hand side stitching adds edge support and longevity to this premium mattress. Millbrook 5 year guarantee followed by 5 year warranty. FREE Express Delivery. See More
    availability
    6.8
  17. Silentnight Airmesh 3000 Mattress

    Silentnight Airmesh 3000 Box Top King Size Mattress

    £964.95

    Silentnight's unique Airmesh technology uses the sleepers movement to circulate cooling air around this state of the art king size mattress. Coupled with a cool to the touch COOLMAX cover and 3000 pocket springs the required temperature drop to allow optimal sleep is achieved every night. A luxurious box top finish creates a sumptuous and supportive medium feel. FREE Express Delivery. See More
    availability
    7.5
  18. Sleep Naturally Eminent 3000 Mattress

    Sleep Naturally Eminent 3000 King Size Mattress

    £949.95

    Wonderfully responsive and super comfy 3000 pocket spring king size mattress. Hand laid wool, cashmere, silk and cotton fillings cushion, support and ventilate. Hand side stitching will ensure peak performance for years to come. FREE Express Delivery. See More
    availability
    6
  19. Nectar Classic Plus Medium Mattress

    Nectar Classic Plus Medium King Size Mattress

    £899.95

    Featuring Nectatex™ and Nectar Smart™ technology, this king size, no spring, mattress contours to your body for dynamic support and pressure relief. Designed for all sleep positions, it’s available in medium and firm tensions, ensuring personalized comfort for a restful night’s sleep. Medium comfort level. FREE Express Delivery. See More
    availability
    7.8
  20. Nectar Classic Plus Medium Mattress

    Nectar Classic Plus Firm King Size Mattress

    £899.95

    Featuring Nectatex™ and Nectar Smart™ technology, this king size, no spring, mattress contours to your body for dynamic support and pressure relief. Designed for all sleep positions, it’s available in medium and firm tensions, ensuring personalized comfort for a restful night’s sleep. Firm comfort level. FREE Express Delivery. See More
    availability
    8.5
  21. Sleep Naturally Dawn 1500 Pocket Mattress

    Sleep Naturally Dawn 1500 King Size Mattress

    £899.95

    Firm, robust support from this 1500 pocket spring one sided king size mattress. Hand laid wool, cashmere, silk and cotton fillings cushion, support and ventilate. Hand side stitching, concealed tufting create the ultimate non turn premium ortho mattress. FREE Express Delivery. See More
    availability
    7.8
  22. Silentnight Airmesh 2000 Mattress

    Silentnight Airmesh 2000 Pillow Top King Size Mattress

    £849.95

    Silentnight's unique Airmesh technology uses the sleepers movement to circulate cooling air around this state of the art king size mattress. Coupled with a cool to the touch COOLMAX cover and 2000 pocket springs the required temperature drop to allow optimal sleep is achieved every night. Pillow top finish creates a medium to firm feel. FREE Express Delivery. See More
    availability
    7.7
  23. Wool Encapsulated 1500 Mattress

    Wool Encapsulated 1500 Pocket Sprung King Size Mattress

    £849.95

    Quality and craftsmanship are immediately evident in this stunning king size mattress. Cooling, knitted cover and wool fillings sit above a responsive 1500 pocket spring unit. Encapsulated foam edge border retains support right to the very edge and extends life of mattress. Firm and ultra supportive. FREE Express Delivery. See More
    availability
    8
  24. Sealy Wickham Geltex Mattress

    Sealy Wickham Pocket Geltex King Size Mattress

    £799.95

    A medium feel Sealy king size pocket Geltex hybrid mattress. A luxuriant pocket sprung core sits below a deep Geltex comfort layer creating a medium feel, cool and responsive sleeping surface and a very popular choice. FREE Express Delivery. See More
    availability
    7.7

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Our goal is to assist you in finding the perfect king size mattress for a peaceful night's sleep.

When looking for a mattress, everyone has different requirements. Your body shape, weight distribution, firmness preference and mattress type are all factors that determine which mattress is for you. 

Explore the collection of mattresses we have available at The Bed Warehouse Direct, and get in touch with our team on 0800 049 0800 if you have any questions about the mattresses we offer.

What is a king size mattress?

A king size mattress is a type of mattress that is larger than a standard double mattress. They are usually 5’0” wide by 6’6” long, which makes them perfect for a couple, especially if someone in the couple requires those extra few inches to fully stretch out.

In order to fit a king size bed into your bedroom, you’ll have to have plenty of space to ensure that your bed fits where you want it to go. It’s a good idea to measure the space where you’d like your bed to go before purchasing it, to avoid disappointment if your bed doesn’t fit when it arrives.

How big is a king size mattress?

A king size mattress is 5’0” (150cm) wide by 6’6” (200cm) long.

We also stock a range of king size bed frames that are designed to fit our collection of king size mattresses.

What other mattress sizes do you have available?

If you’d like to explore the other sizes of mattresses we have available, we offer a variety of different options for you to consider:

What types of king size mattresses do you stock?

We offer a wide range of king size mattresses that are crafted using a combination of traditional and modern methods, as well as automated techniques. This ensures that our king size mattresses are of high quality, and you can explore the different options we have available below:

King size open coil mattresses: These are made using individual steel coils that are connected to each other and reinforced with a thicker gauge steel for added firmness. However, it's worth noting that while some people may find these mattresses beneficial for back support, it may not be the case for everyone.

King size pocket spring mattresses: These are composed of individual steel coils that are encased in fabric. This design allows each spring to move independently, providing customised comfort and support that conforms to the sleeper's body shape.

King size memory foam mattresses: This is a great choice for those looking for a comfortable and responsive surface. These mattresses are created by bonding together various types of foam to reduce pressure points. However, one common issue with traditional memory foam mattresses is that they tend to trap heat, making it hard for some users to move around comfortably. But, the good news is that manufacturers have come up with solutions such as incorporating cooling foam or latex-based foam layers to address this issue.

King size hybrid mattresses: This is designed to give you the best of both worlds, combining the traditional benefits of spring mattresses with the modern technology of memory foam. This creates a versatile and comfortable sleeping surface that is sure to provide you with a great night's sleep. This hybrid mattress is a great option for those who want the support of a spring mattress as well as the pressure relief of a memory foam mattress

What's the best king size mattress for my sleep position?

The best king size mattress for you will depend on your preferred sleep position.

Front sleeper

If you're someone who sleeps on their front, it's crucial to choose a firm king size mattress. This is because a soft mattress can cause your hips to sink too far, resulting in lower back pain. 

It's worth noting that sleeping on your front can be a sign of a pre-existing lower back condition, so if possible, it's best to avoid this position. However, for those who can't change their sleeping position, a firm mattress is an essential choice to help alleviate any discomfort.

Back sleeper

For those who sleep on their back, a medium-firm king size mattress is the ideal choice. This type of mattress should be firm enough to keep your hips in alignment, but also soft enough to adapt to the curve of your lower back, providing a perfect balance of support and comfort. 

A medium-firm mattress will help keep your spine in a neutral position and reduce any pressure points, making for a comfortable and restful night's sleep.

Side sleeper

For those who sleep on their side, having a responsive mattress is essential. A mattress that allows your hips and shoulders to sink in while still providing support for your waist is ideal. 

Depending on your body shape, a soft king size mattress may be the best choice.

This type of mattress will conform to your body and provide the needed support for your hips, shoulders, and waist. It will also help to reduce pressure points, allowing for a more comfortable night's sleep.

How much does a king size mattress cost?

When it comes to purchasing a new king size mattress, it's important to remember that investing in a quality product can have long-term benefits for both your physical and mental health. 

Assuming a new king size mattress lasts around 8 years with 2 people sleeping on it, even a higher range king size mattress from £500 would be costing each sleeper from as little as 9 pence per night.

A middle range king size mattress costing between £200 and £500 would work out at between 3.5 pence and 8.5 pence per sleeper per night.

If you were to buy a cheap king size mattress for less than £200 that could be as low as just 2 pence per night per person.

How do I choose the right king size mattress for me?

It's crucial to figure out what level of comfort you're after when looking to purchase a new king size mattress. 

Take a moment to think about what you liked about your old mattress when it was new, and what you wish you could change about it now. It can also be helpful to think about a time when you slept exceptionally well on holiday and try to replicate that mattress's feel.

It's also important to consider how your own body shape and weight will affect your mattress choice. Keep in mind that product descriptions and firmness guides are based on average body types, so a mattress that feels comfortable for one person may not feel the same for someone else with a different body shape or weight.

Don't hesitate to take a look at the resources available on our website such as our FAQ videos, Bed Buyer's Guide, and our blog. We've tried to provide as much information as possible to help you make the important decision of choosing the best mattress for you.

If you're still unsure about which mattress to purchase, our expert team is here to assist you. You can give us a call at 0800 049 0800 during business hours (9:30am - 5:00pm) or drop us an email, and we'll get back to you. Our advisors have extensive experience and will provide friendly, honest, and highly-skilled advice without any pressure to buy.

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