King-Size Mattresses

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.

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

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.

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.

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.

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.