XS    S   M   L XL
Waist

11.5"-

12"

12.5"-

13"

13.5"-

14"

14.5"-

15"

15.5-

16"

Hip 17.5" 18" 19" 20" 21"
Rise 12.5" 12.75" 13" 13.25" 13.5"
Thigh 10.75" 11.25" 11.75" 12.25" 12.75"
Length 37.5" 38" 38.5" 39" 39.5"

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

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

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