To choose the correct size for you, measure your body as follows:
Measure around the fullest part, place the tape close under the arms and make sure the tape is flat across the back.
Measure around your body at the point where your pant’s waistband would sit
Measure at the fullest part of your hip point.
Sleeve Length :
Take a three point measurement starting at the center back of your nck to your shoulder point to the point just below your wrist bone.