Measure around the fullest part of your bust with a cloth measuring tape. Arms should be relaxed by your side and breath expelled from lungs.
Using a cloth measuring tape measure around the narrowest part of your torso between your rib cage and navel. Arms should be relaxed by your side and breath expelled from lungs.
Standing with feet slightly apart, knees aligned over ankles use a cloth measuring tape to measure around the fullest part of the hip and buttocks.