The Strap is elastic and adjustable.The green elastic is a little more rigid than the black elastic.
How to measure your sizes:Going over your shoulder, measure from your rear center belt loop to either the left or right front belt loop.
Sizing Chart:
(measured from back clip to front clip)
Small……38″– 41″
Medium…41″– 43 1/2″
Large…43 1/2″– 46″
XL…47″– 50″
XXL…50″– 53″
XXXL….53″ — 56″
Feel free to give us a call if you have any questions.Thank you!