NuBra womens #S900 Super Padded Adhesive

Finally time to replace my original adhesive nubra (which I've loved for years), so I wanted to get the exact same item. Description says "true to size, order usual size," so I ordered B. When the package arrived, the box was marked "A" and there was a note in the container that the bra itself is one size larger than the size marked on the box because the padding adds a cup size. In that case, my box should be marked B and contain a C size adhesive bra. Compared the new bra to my original favorite that came in a box marked "B" and the new one was definitely a bit smaller. I noted on the return I received the wrong size, and re-ordered size B. Again, I received a box marked "A". I was going to attempt to order a size C thinking maybe they'd send me the correct size B box that way, but unfortunately size C and up aren't options available for the padded bra. I have an event coming up that I need this adhesive bra for, and I'm feeling frustrated that I can't seem to get the correct size.