XS    S   M   L XL
Bust 15.5" 16" 17" 18" 19"
Waist 12" 12.5" 13.5" 14.5" 15.5"
Hip 17.5" 18.5" 19.5" 20.5" 21.5"
Length 38.5" 39" 39.5" 40" 40.5"

*Model is 1.64cm, UK 6 and wears size S

If you are in between sizes for bust/waist, it is best recommended to size up. 

*In between sizes refers to your measurements falling between 2 sizes, example size S & M.