I am actually not sure on their size guys! The last I asked her what size they are (prob a couple of years ago) she said she wore a 34b cup... I am not that sure, but I think she wears a c cup now, but I feel like they're a little bigger than that.
Based off of pictures and stuff I see online I think they are small d probably. Either way they are beautiful, and I am positive they have grown (and kept their size) over the last year.