Super king is the biggest size we do in mattresses. They are great if you like a large amount of space. Its measurements are 4′6″ x 6′3″ (135cm x 190cm). We have a variety of Super King mattresses available in all types including memory foam, orthopaedic, pocket sprung and coil sprung. Browse our full collection of Super King mattresses today. You'll find what you need for sure!