Using measuring tape, measure your body (not over clothing) and refer to diagram as a guide. If you fall between sizes, order the Smaller size for a tighter fit or the Larger size for a looser fit.
Measure around the base of your neck
Measure under arms and around the fullest part of your chest with measuring tape parallel to the floor.
Slightly bend elbow and measure from center back neck, over top of shoulder and down to wrist.
Measure around your waist where you wear your pants.
Stand with your feet together and measure around the fullest part of your hip with the measuring tape parallel to the floor.
Measure inside of leg from crotch to ankle or desired length.