Bust
Measure around the largest area of your bust, ensuring that the measuring tape sits flat across the back. Tape position should be as close to the under arm position as possible.
Waist
Measure around the narrowest part of your torso, ensure that the tape stays parallel with the floor.
Hips
Stand with heels apart and measure around the fullest part of the hip and bottom area. Again, ensure that the tape stays parallel to the floor to ensure correct measurement is achieved.