Bust size: Measure around your chest, at the fullest point of the bust (not under the bust).
Waist size: While standing up straight, bend at the waist to one side. The crease that forms is where your natural waist is located; measure there.
Hip size: Standing with your feet together, measure around the fullest part of the hips.
It is important to note when determining your dress size, very few people fall completely under one size. Measurements are as individual as we are. Most of the time, a gown will need alterations. It is important to note that it is always easier and safer to have items taken in rather than out. Ultimately, the choice of size is up to you.