text: how can i reduce the size of my breasts? i'm 36b and i want to go down to at least 36a or better yet to 34a but i don't want to go through a surgery.  anybody who knows an effective exercise or ointment i can apply?  please, please . . .  thanks! the only way to decrease cup size is to decrease the amount of breast tissue. this can be achieved two ways, one is surgery, the other is too loose weight. the majority of breast tissue is composed of fat, but you can't loose fat in just the breasts, you will loose all over. if your not overweight then the only way to reduce breast size will be surgery. sorry, it's genetic.