An easy way to estimate your draw length is to use the wingspan method. To measure wingspan, stand with your back against a wall and have someone make a mark at the tip of each of your middle fingers; now measure the distance between the marks. Take this measurement, subtract 15″ then divide by two. This method will be very close for most people’s draw length. Of course as with any estimation method, it is not perfect and adjustments may need to be made to get a perfect draw length.
Here is a quick chart with the calculations already made: