I bought this in an XS, which on the package means A/B, 30-32.  I'm a 32 A and the XS was a joke!  The bra fit fine around my rib cage so I'll agree that 30-32 is appropriate.  But the cup size was more like a B-C.  No way would this fit an A cup.  Waaay too much material in the cup for an A size.  I would have had lots of extra fabric and no shape definition with this thing.  Huge disappointment.