I think I'm probably a large B, unfortunately. I only know this because I just looked online and it said the difference between the measurement under the bust and over the fullest part of it can tell you which cup size you are. So, if there is 1 inch difference, you are an A; 2 inch, a B. And so on and so forth. I'm pretty sure because I've put on a lot of weight recently, they are larger for that. Mine are very much affected by my weight. They can be pretty small if I lose a lot of it. So, that is what I am going to try to do. I would be very happy to do away with them entirely. Makes me feel gross just talking about them.