S  M   L
PTP 16"  17" 18"
Waist 14"  15" 16"
Length (Exclude Straps) 10"  10.5" 11"

*Model is 1.68m, UK 6 (PTP15.5", Waist 12.5") and wears size S.

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

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