To find the most accurate sizing we'll need your bust, waist, and hips measurements. If you're between sizes, it's best to go larger. You can always take it in and get it altered, and it's a lot less depressing for something to be too big than too small. Please keep in mind your bust measurement is not your bra size!! It is the measurement of the fullest part of your chest. If you use your bra size it will be too small, and nobody wants that.