Bust: Wear only a simple bra and measure around the fullest part of the bust. Make sure the tape does not sag or twist at the back.
Waist: Place your hands at the narrowest point of your waist, approximately 2.5 inches above your belly button. This position is called your "natural waist". Place the tape measure around your "natural waist" turning in front of the mirror to ensure that the tape or string is level with the floor.
Hip: The hip measurement should be taken 8 inches below the waistline measurement.
After measuring your bust, waist and hips you should be able to select the correct size based on the corresponding size chart measurements below.