S  M L
PTP 18" 19" 20"
Waist  14.5" 15.5" 16.5"
Length 16" 16.5" 17"

*Model is 1.70m, UK 4/6 (PTP 15", Waist 12") and wears size S.

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

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