Your waist measurement is typically your jean's waist size with 2 inches added. This provides enough room for your chaps to fit over your jeans and possibly a belt.
With your jeans on, measure around the thickest part of your thigh while sitting down.
With your riding boots on, measure from the top of your belt to the floor along the outside of your leg.
Note: Our chaps come in two lengths: Regular and Long. Your outseam measurement determines which length you will receive. You may need to trim your chaps slightly to get the exact length you desire.