Indeed they do use the rest of the alphabet.
Wapsi Gals! As I still get asked questions regarding bra stores and frequently have female Wapsi fans approach my table at conventions and begin telling me how they found their correct bra size thanks to my comic, I want to direct you to another awesome bra store. How many of you remember Pvt. Vasquez from the movie Aliens? Well, the gal who played her, Jenette Goldstein, a busty gal herself, has opened a specialty bra shop of her own! Jenette Bras- the alphabet starts at ‘D’. Click on the image below to go to her site!
Indeed they do use the rest of the alphabet. =)