He is just saying to double your draw length, then add the handle/fade area. So, 26" draw, 4" handle, 2" fades would be (26x2)+4+2+2 = 60" overall...BUT you have to add at least an inch overall for nocks, and 2 would be safer...so overall starting length of the stave in this example would be 62", which is back to the double draw length plus 10.