Measurements are taken from point to point of product, unstretched and stretched. Multiply measurements of bust and waist for circumference. 

Size          Bust   Waist Length      
XS 14.5 - 15.5inch | 39.8 - 39.5cm 12.5 - 13.5inch | 31.8 - 34.3cm 14inch | 35.5cm
S 15.5 - 16.5inch | 39.3 - 42cm 13.5 - 14.5inch | 34.3 - 36.8cm 14.5inch | 36.8cm
M 16.5 - 17.5inch | 41.8 - 44.5cm 14.5 - 15.5inch | 36.8 - 39.3cm 15inch | 38cm
L 17.5 - 18.5inch | 44.3 - 47cm 15.5 - 16.5inch | 39.3 - 41.8cm 15.5inch | 39.3cm
XL 18.5 - 19.5inch | 46.8 - 49.5cm 16.5 - 17.5inch | 41.8 - 44.3cm 16inch | 40.5cm