Sizing Chart - Beta Series

Measure Waist (inch) Inseam (inch) Hip (inch)
M 28-30 27.5 41
L 30-32 27.5 43
XL 34-36 27.5 45
XXL 38-40 27.5 47

*All measurements are close approximates. 

Waist :  Measure around the narrowest part of the waist, keeping the tape horizontally.
Hip : Stand with your feet together and measure around the fullest point of the hip, keeping the tape measure horizontally.
Inseam : Measure from the crotch seam to the bottom of your leg.