User blog comment:Xilinoc/Realistic One Piece/@comment-24850639-20150526201609/@comment-5398287-20150526222008

It's not necessarily the bust size that I find unrealistic, as I'm positive there are women in real life with such sizes as well. It's the waists. They are impossibly thin, such that it barely looks like there are any internal organs present, and while thin waists and big boobs are both possible, having both at the same time generally leads to severe back pain and permanent spinal damage: in the case of Nami and Robin, since both parts are exaggerated, I'm assuming that the effects would thus be far more severe.