I was happy to find a reasonable priced nursing bra in my size - 36F. One size according to the packaging covers numerous cup sizes (my box was C-H) and for an under wire bra, I don't see how that can work. For me the cup was not wide enough, it left a gap in the middle of my chest (instead of resting on my chest between the breasts as a proper fit should). If the cup fit I would have kept it.