What is the largest bra size? Technically, there is no limit to how big a bra size could be. There are over 250 bra sizes to choose from. Presently, the largest bra size ever recorded is 102ZZZ, belonging to Annie Hawkins-Turner (Norma Stitz), a woman from Atlanta, Georgia.
If your bust size is less than 1 inch bigger than your band size, you're a cup size AA. 1-inch difference = A. 2-inch difference = B. 3-inch difference = C.