Single mattresses are available in the small 2ft6 x 6ft3 (75cm x 190cm) size and standard 3ft x 6ft3 (90cm x 190cm) size.
The standard double mattress size is 4ft6 x 6ft3 (135cm x 190cm) The three quarter double is also available in the 4ft x 6ft3 (120 x 190cm ) size.
The King size mattress is longer and wider that a double mattress the overall size of a king size mattress is 5ft x 6ft6 (150cm x 200cm)
The Super king mattress is the UK’s largest standard mattress size. the overall size is 6ft x 6ft6 (180cm x 200cm)