Note: the measurements provided in the size guide refer to body measurements, not garment measurements. How to take your measurements:
Chest measurement: with a measuring tape, pass it under the armpits and around the fullest part of the chest.
Waist: measure around the waist, at the narrowest point.
Hips: stand with your feet together and rotate your hips with the measuring tape passing over the fullest part of your buttocks.