I find this picture in intriguing.
Looks like a Curvy Kate Princess bra (or a copy), and the image seems slightly warped by the mirror.
I’d be guessing, but she looks very slim - possibly a 26-28 back, and somewhere around E-F in cups, maybe a 26-28F. If I had to guess, I’d say 28F.
What do you find intriguing about it?