Draw length is the most important part of the bow setup. Without correct draw length the shooter will be inconsistent or uncomfortable with his or her bow. Here is how to determine correct draw length.
Stand naturally (don't stretch) with your arms out and palms facing forward. Then simply measure from the tip of one middle finger to the tip of the other across your back (its easier to have someone help). Once you have that number , divide it by 2.5. If you shoot a release off the string, this is your draw length. For shooters that wish to shoot a string loop, add 1/2" to that number. If you want to shoot wih fingers, add 1.5". If you come up with a number that is not an even number for length then round down. This will make it more comfortable and easier to shoot.