King Size Mattresses

Need a little extra room? We’ve got you. Get a great sleep night after night on a Dormeo king-size mattress; designed to offer you room to find your perfect sleeping position.

Our fantastic range of king-size mattresses (150x200cm) are roomier than a standard double, but provide the same level of comfort and support.

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Frequently Asked by Our Customers

What size is a king-size mattress?

Ideal for taller or heavier sleepers, king-size mattresses are a spacious alternative to standard double mattresses, which typically measure 150cm wide by 200cm long.

So, if you like a little extra luxury but don’t have space for a super king-size, a king-size mattress offers a neat middle ground.

What are the dimensions of a standard king-size mattress?

A standard king-size mattress is 150cm by 250cm, making them ideal for mid-to-large size rooms.

How much bigger is a king mattress than a queen?

In short, quite a bit! King-size mattresses are 30cm wider and 10cm longer than a small double mattress (otherwise known as queen-size).

We recommend that you don’t attempt to fit a king-size bed on a queen-size frame.

Can a king-size mattress fit on a double bed?

We’d avoid it. Given the size difference between a king-size mattress and a much smaller double bed, it’s best to only put king-size mattresses on king-size frames.

If you’re looking to upgrade your sleeping set-up with a king-size mattress, go the extra mile and choose from our premier king-size bedding range, including pillows, duvets and sheets, or add a mattress topper for ultimate comfort.

How much is a Dormeo king-size mattress?

We’re dedicated to delivering a quality night’s sleep at an affordable price, so we offer a wide range of king-size mattresses to suit all budgets.

What is the best king-size mattress for me?

That depends entirely on your sleeping position. If you’re a side sleeper, you’ll likely be more comfortable on a softer mattress, or if you want to really appreciate the extra space a king-size mattress offers by sleeping on your front or back, you may prefer something firmer.

If you’re one-half of a couple with drastically different sleeping positions, we’d recommend a medium firmness mattress.

Take a look at our mattress firmness guide for information on the best mattress fillings and firmness ratings for side sleepers, back sleepers, and front sleepers.

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Our King Size Mattresses

At Dormeo, we’re dedicated to delivering comfort, and our king-size mattresses are spacious, supportive, and stylish, making them the perfect ally for a good night’s sleep.

Our European king-size mattresses are an extra 10cm wider. Of course, if you have enough room, you could even push the boat out with a super king mattress: the largest and most luxurious size we offer. Measuring 180cm by 200cm, they’re twice as wide as a single mattress!

Need extra support? We’ve got your back. Our king-size mattresses are available in Memory, Fresh, and Octaspring, so you can find the ideal style for your sleeping needs. And with our 60-night comfort guarantee, you’ve got a full two months to decide whether your mattress is right for you.

Should you have any questions about our king-size bed mattresses, you can get in touch with our team at [email protected] or 0800 625 0134. They'll be happy to answer your queries or provide more information.

We offer free UK tracked delivery so order a king-size mattress from our online store today. Alternatively, take a look at some of the other mattress sizes we have on offer.

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