Christina, that's what I read at least... bust size nothing to do with BM supply. importantly, if you plan to breast feed, you should take in more liquids, eat well balanced meals, have enough rest and sleep, don't be stress, and latch on bb freuqently or use a good pump to stimulate supply. ideally, you should be expressing at bb's every feed, or feeding bb directly on demand. for most mothers, milk supply is well established by 6 weeks.