32AAA to 270cc Moderate Silicone Would Be What Cup Size?

It depends on what your idea of a B cup is, but from your description, it sounds like a good size for your situation.

I'm in the camp of trying sizers and pick the look you like. I try not to get hung up on numbers and letters. I see my role is to give guidance to help insure that what the patient desires and what implant size they choose are in agreement.