S   M   L
Waist 12.5" 13.5" 14.5"
Hip 18" 19" 20"
Rise 12" 12.25" 12.5"
Length 38" 38.5" 39"

*Model is 1.70m, UK 4/6 (Waist 11.5", Hips 16.5") and wears size S

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

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