How many cup sizes can you go down safely with a reduction?

A breast gland can be removed down to completely gone which would then be a mastectomy. The issues in reduction are retaining the blood supply, function, and sensation to the nipple-areola and solving the problems associated with breasts that are too large, too heavy, and too saggy. Normal breast size ranges from A to C cup in relation to the chest circumference. In other words, a female chest is built to handle breasts in the A-C cup range but sizes beyond a C cup are outside the normal range and can cause problems due to weight and position. The average breast size is a mid B cup. There is no physiologic reason to go smaller than average for a breast reduction as even a reduction to a C cup will solve the functional problems. 

Thank you for your question. The answer to this question varies from patient to patient due to many factors including the size desired, breast volume and risks that might be associated with the surgery itself. Breast reduction surgery most often achieves excellent results as most patients are relieved of the burden that leads them to surgery in the first place. Of course, there are concerns regarding going to small as this can potentially jeopardize sensation and also survivability of the breast. With the more current approaches,  improved shape and a reduction of scarring can often be achieved as opposed to more traditional anchor scar techniques. I would suggest that you seek out a consultation with a board certified plastic surgeon who is experienced in the procedures. I hope this helps and have a wonderful day. Dr Kayser - Detroit