Home Mattresses Super King Mattresses 6'0 Super King Mattresses 6'0 Sleep on our biggest mattress. Our super king size mattresses measure 180cm by 200cm, giving you an extra half metre in width than a standard UK king size bed. Shop our collection for a super king mattress – a 2000 pocket sprung mattress or a 3000 pocket sprung mattress and memory foam mattress. Alternatively, order super king size zip and link beds today, that split into two single beds. There are no products matching the selection. What does a UK super king size mattress measure? The UK super king size mattress is the largest in our range of mattresses, at a width of 180cm and a length of 200cm. We deliver our range of UK super king size mattresses worldwide. What styles of UK super king size mattresses do you sell? At Bed Guru we have a full range of styles available for you to choose from for your mattress. They range from pocket sprung, to orthopaedic and contract hotel & leisure. All our styles of mattresses are available for worldwide delivery.