I have no idea about the succession or timeline of Pandora's implants, but one of the things that always stood out, besides those pronounced nipples that could never be hidden, was that her areola never got stretched larger, so I have to imagine each succeeding implant never pushed the limits of her skin. In this age of expanders pushing breast expansion, large areolas always result, which is not only sexy, but often difficult to hide with plunging necklines, which again, is sexy.