XS S M L XL
PTP 15" 16" 17" 18" 19"
Waist 13" 13.5" 14" 14.5" 15"
Length 15.5" 16" 16.5" 17" 17.5"

*Model is 1.73m, UK 4/6 (PTP 15.5", Waist 12") wears size S.

If you are in between size for PTP, it is best recommended to size down.
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.