Draw arm should be straight when measuring circumference around elbow. Measure at the largest part of the elbow. Strap should fit snugly around the draw arm when arm is bent in the full draw position. If strap is too large, it will slide down the arm, causing the rubber cord to be too weak to obtain optimal results.
Sizing Shooting arm measurement
Medium 10" to 11"
Large 11" to 12"
X-Large 12" to 13"
Answered on 8/17/2010 by Johnathan Karch from 3Rivers Archery