Sorry for the confusion - Ed Pechter is a Plastic surgeon who came up with an alternative methode of determing the proper cup size due to many of his patients complaing about fitting issues.
Step 1: measure across the fullest part of the breast (across the nipple), starting at the outside of the breast crease and going to the inside of the crease
Step 2: Because bra manufactures make cup sizes larger for for larger band sizes and smaller for smaller band sizes you need to add too or subtract from this number to determine your perfect fit. The base is 36" band size if this is you dont save your number and skip this step. For bands smaller then 36 add 1/2" to your number for ever such decrement (example: 34" band you would add 1/2") for every band size higher then 36" you would subtract from your number by 1/2" for every increment (example: for a 38" band size subtract 1/2" from your number)
Step 3: Take the number obtained from step 2 and apply it to this chart to get the perfect cup size for you!
7" = A cup; 8" = B cup; 9" = C cup; 10" = D cup ; 11" = DD cup; 12" = DDD (E cup). (With 7 1/2 " being full A, 81/2 full B and so on)
(lol and dont ask how i know this

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