Thought I'd post this as am amused as both my SIL's currently BFing (they don't know each other) yet made comments that made me think/laugh!
SIL 1 is DH's sister. She is still BFing her DS2 who is 16 months although is is working full time. He still feeds 4+ times a day plus more at the weekend. She said - I don't want to stop as my breasts will disappear - she is currently a "B" cup but usually a "AA".
SIL 2 is my brother's wife. She is BFing her DD who is 4 months old. She has very very huge breasts which are much bigger than they usually are - she said she is going to stop as her breasts are bigger than her head (each one) and she can't stand it any more.
Has never been a consideration for me as mine normalish size both normally and when Bfing.