For reasons I've yet to fathom, due to having Breasts, I don't fit in most women's specific cycle jerseys, even if the zip will start to close over my waist, the boobs just don't fit. Rapha are the worst for this, I have a mens brevet jersey from them, as I could't fit in even their largest women's jersey. I spoke to a couple of the women who work in the Rapha store in Amsterdam, and even they do the same thing...
Apparently the typical female cyclist is actually some species of pixie.
On the plus side, after losing 15kg, I dropped into the top end of the rapha womens cycle shorts, their XL fits.
Grumble grumble
J