Mattress Sizes

Mattresses Sizes 
Small Single: 2ft6" x 6ft3" (75cm x 190cm)
Single: 3ft x 6ft3" (90cm x 190cm)
Large Single: 3ft 6 x 6ft 3" or 6ft6" (105cm x 190cm or 200cm )
Small Double: 4ft x 6ft3" (120cm x 190cm)
Double: 4ft6" x 6ft3" (135cm x 190cm)
King Size: 5ft x 6ft6" (150cm x 200cm)
Extra Large King Size: 5ft6"x 6ft6" (165cm x 200cm)
Super King Size: 6ft x 6ft6" (180cm x 200cm)
Emperor Size:  6ft6"x 6ft6" (215cm x 215cm)

Other Sizes available are
Euro Double Size: 4ft6" x 6ft3" (140cm x 190cm)
Euro King size: 5ft 3" x 6ft6" (160cm x 200cm)

Made to Measure Sizes
Other Sizes can be made in increments of 3", i.e 6ft 9" or 7ft3". Or widths ranging from 3ft3", 3ft9", 4ft3"or 5ft6". Only a selected few companies will make these sizes, usually the cost is around 30% more.