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King Size Mattresses

King Size Mattresses

A King Size mattress provides that little bit of extra space and comfort over a Double mattress, giving you and your partner the space to spread out without disturbing each other's sleep. They are not only great for couples but also for taller people as they are longer than standard double mattresses.

Having as much space as possible during a night's sleep is very important. Being able to move around whilst sleeping will not only help you sleep deeper but also benefits recuperation as the body can relieve pressure points and aid circulation.


Kingsize Mattress Dimensions:
150cm (width) x 200cm (length)
5' (width) x 6'6" (length)


Please note; a Kingsize mattress is 3 inches (approx 10cm) longer (head to toe) than the smaller sizes, so please keep this in mind if you're planning on using a Double base with a new Kingsize mattress.


Click Here to view our full size guide.

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  1. Next Day
    Buy the award-winning Hypnos Wool Origins 6 mattress online
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    Hypnos Wool Origins 6 Mattress
    Now £1,699.00 Was £2,429.00 Save £730.00
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    From only £66.47pm

  2. 30 Day
    Hypnos Elite Luxury Mattress
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    Hypnos Elite Luxury Mattress
    Now £539.00 Was £879.00 Save £340.00
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    Sealy Mellbreak Mattress - Ortho Plus Collection
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    Sealy Mellbreak Mattress
    Now £389.00 Was £649.00 Save £260.00
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    SleepSoul Space 2000 Mattress
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    SleepSoul Space Mattress
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    Emma Original Mattress - Buy online at MyNextMattress
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    Emma Original Mattress
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    Harrisons Spinks Pillow Top Mattress
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    Harrisons Knighton 8250 Pillow Top Mattress
    Now £1,200.00 Was £2,219.00 Save £1,019.00
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    Sleepeezee Cool Rest 2400 Mattress
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    Sleepeezee Cool Rest 2400 Mattress
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    Hypnos Elite Ortho Support Mattress
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    Hypnos Elite Support Mattress
    Now £594.00 Was £949.00 Save £355.00
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    Nectar Mattress Classic
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    Nectar Classic Memory Foam Mattress
    Now £499.00 Was £879.00 Save £380.00
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    Sleepeezee Pocket Gel Plus Immerse 2200 Mattress
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    Sleepeezee Immerse PocketGel Plus 2200 Mattress
    Now £999.00 Was £1,299.00 Save £300.00
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    From only £39.08pm

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    Sleepeezee Poise 3200 Mattress
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    Sleepeezee Poise PocketGel Plus 3200 Mattress
    Now £1,149.00 Was £1,549.00 Save £400.00
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  12. 29 Day
    Hypnos Harrow Pocket Sprung Mattress
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    Hypnos No Turn Harrow Mattress
    Now £522.00 Was £899.00 Save £377.00
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    29 Day Dispatch

    From only £20.42pm

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King Mattresses Designed For Even More Space

King Mattresses Designed For Even More Space

Our range of king size mattresses offer a multitude of styles and brands known worldwide for their quality and innovative technology when it comes to comfort, support and overall sleep health for the body. The collection of king size mattresses are perfect for individuals or partners that enjoy more space when it comes to sleep. Choose from traditional pocket sprung mattresses where the springs move autonomously, or our memory foam mattresses feature customised elegance and comfort like no other – conforming to your unique body shape. Our king size mattresses come with FREE delivery and sleep trials, additionally, you can enjoy a guarantee of up to 30 years.

For king mattress brands that are loved worldwide, such as Hypnos, , Octaspring and more – browse our collections in full online. We have a range that is suitable for all tastes, budgets, and comfort levels. We offer a 14 night sleep trial, where you can try your preferred mattress for 14 days and if you aren’t happy, we offer an exchange or refund. We understand how difficult it can be in finding the right mattress, but as your leading mattress experts, we’re always on hand to help.

What size is a king size mattress?

150CM X 200CM (5’ x 6’6”)

What are the different types of king size mattresses?

There are no limits! Every manufacturer makes mattresses in this size. This is the second most popular size (after Double) and we’re proud to be the biggest stockist of this size anywhere in the Country. Kingsize mattresses are available in every specification and firmness level, made to all budgets and by all suppliers.

What is the best king size mattress?

A Kingsize mattress has a good amount of width, 150cm, and so this means there is ample space to move freely during sleep. As such, a strong sidewall may not be such an important consideration and this could increase the choice you have available to you.

Who is a king size mattress best suited for?

King mattresses are the perfect size for a shared bed, or can offer a luxurious night’s sleep for single users. We would always suggest taking a quick look at the access to the bedroom to prevent problems upon delivery, as some mattresses can be very difficult to maneuver into the room.

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Chetan Patel

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Great service from start to finish. We had worried about buying a mattress online, but we should not have. Service was excellent and we saved a small fortune!

Very good service!

Fiona Harris

Verfied Buyer

Im a very happy customer! Very happy with the product, the price and the service. A special thank you to the delivery men who took a very heavy mattress to the room!

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