Measure under arms around the fullest part of the chest. Be sure to keep tape level across back and comfortably loose.
Measure around the narrowest part of your torso. This is usually right below your belly button. Be sure to keep tape level and comfortably loose.
Standing with your heels together measure around the fullest part of your hips. Your lower hip is about 8 inches from your waist.
Men's Arm Length
With your arm bent 90 degrees at the elbow measure from the center of the back of your neck to your wrist.