wtf how the hell would now lmaof
The best way is to go to a professional who can measure you properly. If you want to do it yourself get a flexible tape measure and have a buddy measure you. Measure your chest, just under your arms. With your arm around your hip, bend your arm to a 90 degree angle. Measure from the middle of the back of your neck, across your shoulder and down outside of your arm past elbow to your wrist. Coat sizes are usually just determined by the chest size.What size would an adult mens shoe size 5 in youth?