King Size Mattresses

A standard king-size mattress is 150cm wide and 200cm long, or 5' x 6'6". This is 15cm wider and 10cm longer than a standard double mattress, and 60cm wider than a single mattress, meaning a king-size offers plenty of space to stretch out — perfect for taller or heavier sleepers. They’re the perfect middle ground if you like space to relax, but can't quite fit a super king-size into your room.

A king-size mattress is 30cm wider and 10cm longer than a small double mattress, also called a queen-size mattress. Since it's so much larger, a king mattress won't fit on a queen bed frame.

Because a king-size mattress is much larger than a double bed, it's best to get a king-size frame if you're upgrading your current mattress. Our king-size beds provide the ideal foundation. We have a range of colours and styles, so you can find one that suits your décor. Add some of our premium king-size bedding and a mattress topper to further enhance your sleeping experience.

The king-size mattress that you buy will depend entirely on your sleeping position and preference. We find that side sleepers prefer a soft mattress, while back and front sleepers like something firmer. Medium-rated mattresses are often the most universal, so they're perfect for couples who sleep in different positions.

Our mattress firmness guide will outline the best mattress fillings and firmness ratings for side sleepers, back sleepers, and front sleepers.