When I got into bows, I did two different styles of finding out my draw length.

1) I did the "wingspan" method and my wife measured my arms out straight and it came up 75", which equates to a 30" draw.

2) I double checked that figure with help from a bow shop. The guy had me draw a long bow that had a wooden dowel permanently attached to the string. There were 1/2" markers all the way down the dowel too. At full draw, the marking point that he measure, also came to 30".

Butch A.