What to measure:
Frame size: Your frame size is the diameter around your chest, below your breasts. Measure
around your ribcage directly under your breasts
Breast Size:Now measure around your chest, over and including the fullest part of your breast.
For larger breasts, get this measurement while wearing a bra.
Bra Number:Add 5 to your Frame size. If the number you get is odd, round up to the next even
For example, if your frame size is 20 inches, when you add 5 to this you get 25
inches. You should therefore round up to the even number, which is 26 inches (bras
only come in even numbers).
Cup Size: The deference between your frame size and bra size, is used to find your cup size. So cup size minus frame size.
0 to 1/2 inch AA
1/2 to 1 inch A
1 to 2 1/2 inches B
2 1/2 to 3 1/2 inches C
3 1/2 to 4 1/2 inches D
4 1/2 to 6 inches DD (E)
6 to 7 inches DDD(F)
7 to 8 inches G
8 to 9 inches H