MATTRESS SIZE DIMENSIONS - IMPERIAL DIMENSIONS - METRIC
Small Single 2ft6 x 6ft3 75cm x 190cm
Single 3ft x 6ft3 90cm x 190cm
Large Single 3ft6 x 6ft3 105cm x 190cm
Small Double 4ft x 6ft3 120cm x 190cm
Double 4ft6 x 6ft3 135cm x 190cm
King Size 5ft x 6ft6 150cm x 200cm
Super King Size 6ft x 6ft6 180cm x 200cm
Euro IKEA Size - Single 3ft x 6ft6 90cm x 190cm
Euro IKEA Size - Double 4ft7 x 6ft6 140cm x 200cm
Euro IKEA Size - King 5ft2 x 6ft6 160cm x 200cm
 

Any other sizes outside these are classified as a non standard size mattress.