Women's Size Guide | The IvoryField.com
A) Bust measurement: Measure around the body where the bust is largest (if you are wearing a bra, measure with the bra on).
B) Waist measurement: Measure with the measuring tape around the waist where it is narrowest. Do not pull the measuring tape tightly, and keep it completely straight/horizontal. Do not hold your breath while measuring, and do not measure directly after a larger meal. Keep one finger between your body and the measuring tape for an exact fit.
C) Hip measurement: Stand with your feet together and measure around the fullest part of your hips, about 20 cm below the waist.