A super king bed is the perfect size for you if you’ve got plenty of space, and want as much room to move as possible. The super king size bed and mattress is the largest standard size mattress you can get. We have a stunning variety of super king mattresses that are either as a mattress or ensemble (a super king size bed with a mattress). The standard size of a super king mattress is 2,040 x 2,040 mm.Use our handy Mattress Selector to find the perfect super kids size bed and mattress to suit your comfort preferences, health needs and price range.