King Size Mattresses

Big is beautiful and you’ll sleep like a king with one of our spacious mattresses.


King size mattresses offer complete comfort and space, without compromising on support. At 150cm x 200cm (59 x 78 inches), it’s a mattress made for those who can only sleep on the best (or want to size up on their double mattress).


So, whether you prefer a king size memory foam mattress, or you’re open to the idea of coil springs, we’re sure to have the perfect choice for you. If you’re looking for something even more regal, then try our super king size mattresses.


Browse our king mattresses below, and don’t forget to try our Mattress Firmness tool!

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    How Big is a King Size Mattress?

    A king mattress measures 150cm x 200cm, or 5.0ft x 6.6ft.

    Is a King Size Mattress Right For You?

    Forget sleeping like sardines! You and your other half will never argue about bed hogging with these spacious wonders. With more than enough space to toss and turn without imposing on your partner, it’s easy to see why it is a fan favourite.

    Perfect if you have a large bedroom or if you’re tall and need those extra few inches to avoid your feet hanging off the end, a king size mattress really adds that special touch.

    Which is the Best King Mattress?

    We want to make buying a new mattress as simple as possible, so each of our products come with customer star and firmness ratings. The more stars a king size mattress has, the better it has been rated by those who have bought and tried it.

    If you’re not sure on which primary filling will suit you best, whether you need some of the special features, or which depth will fit your bed, please take a look at our Mattress Buying Guide and our Measuring Guide.

    Need Even More Space?

    You’re certain to sleep well on a king size mattress, but if you’re after something even more spacious, then consider our super king size mattress range - here at Happy Beds, there’s something for everyone.