King Size Mattresses
King size is the second-largest standard mattress size measuring 150 cm (5 feet) wide and 200 cm (6 feet 6 inches) long - the recommended bed size for two adults if your bedroom is big enough. King size mattresses are wider and longer than a double, and only slightly narrower than a super king.
Use the filters below to help you find what you're looking for. If you're not sure where to start or need advice about mattress sizes, check out our handy mattress size guide and mattress buying guide here.
Enjoy Complete Comfort with a Silentnight King Size Mattress
We want you to revel in the countless comfort benefits of sleeping in a Silentnight king size mattress. At Silentnight we understand the importance of undisturbed sleep; with countless advantages, such as improved concentration, wellbeing and health. With this in mind, our ambition is to provide perfect sleep solutions for the whole family.
Comfort starts with the size of your Silentnight king size mattress; providing you with as much sleep space as possible, you’ll have the freedom to move throughout the night and indulge in complete sleep satisfaction.
Find a Silentnight King Size Mattress That Fits Your Mould
As the UK’s leading sleep experts, we recognise that comfort factors differ for each sleeper. With this in mind, our king size mattress range is designed with a variety of comfort fillings; making it easier to find the perfect Silentnight king size mattress for your needs.
Designed with our exclusive Silentnight Miracoil and Mirapocket springs systems, our Silentnight king size mattresses work to distribute weight evenly across the bed; minimising partner disturbances. Functioning in absolute harmony with your body, the unique spring systems successfully respond to all body shapes and sizes, providing targeted support and pressure relief.
A Silentnight king size mattress is all you need for a perfect night’s sleep, however, we understand that picking up and installing a King Size mattress may be a daunting task - but there’s no need to worry, as we’ll do all the hard work for you. We offer FREE UK delivery, so once you’ve chosen your dream mattress there’s no stress or waiting around, we’ll even remove your previous mattress for you - find your answer to total comfort in our Silentnight king size mattress range.