A cup

plural A cups

1. A standard, relatively small, bra cup size, consisting of a measurement around the bust that is one inch longer than a measurement around the band, plus five inches.

   The smallest cup size is AAA. The largest is a DD/E. An A cup is fairly small, just a little swell of breast tissue.

   1999, Elizabeth M. Hoekstra, M. Beth Cutaiar, Just for Girls

2. A woman with small breasts (of this cup size).

   Directly after Julia is Patricia, who, oddly enough, is another young blond mother from the suburbs. She, too, is an A cup wanting breast implants.

   2004, Z Paul Lorenc, Trish Hall, A Little Work

   1 more example

   "Gabrielle had always been an A cup, but her pregnancy had left her breasts flat as pancakes, and she wanted to go to a C cup and eliminate some of the sag."

   2003, Michelle Copeland, Change Your Looks, Change Your Life, →ISBN