+1 what Man2 said!
I've got tiny breasts but 32 under bust, so I ordered M cups. I never filled them up but they were very small on my rib cage. I want full round breasts, so upped to L, which I don't fill at all, but when I used them, helped to build tissue on the sides and under for wider breasts.
Definitely start as large as your ribcage can handle!
Xo, Soli
I've got tiny breasts but 32 under bust, so I ordered M cups. I never filled them up but they were very small on my rib cage. I want full round breasts, so upped to L, which I don't fill at all, but when I used them, helped to build tissue on the sides and under for wider breasts.
Definitely start as large as your ribcage can handle!
Xo, Soli