-
Step 1
The first step determines your band size. Measure around your ribs directly under your breasts. This number needs to be even so you will either add 4 or 5, which ever one makes the number even.
-
Step 2
These next two steps will measure your cup size. Measure from behind your back all the way around from under your arm.
-
Step 3
Measure around the fullest part of your breast.
Take the difference from step two and step three. If there is less than an inch you are a size AA. One inch is an A. Two inches is a B. Three inches is C. Four inches is a D. Five inches is DD. Six inches is F.













