What size Breast Reduction - How does a doctor determine what cup size they will be after reduction?

Thank you for the question.  No, there is no direct correlation between the amount of tissue removed and the bra cup size that a patient will wear after breast reduction surgery.
Before undergoing the breast reduction procedure it is very important to communicate size goals with your surgeon.  In my practice, the use of photographs of “goal” pictures (and breasts that are too big or too small) is very helpful. I have found that the use of words such as “natural” or “C or D cup” means different things to different people and therefore prove unhelpful.
Also, as you know, cup size varies depending on who makes the bra; therefore, discussing desired cup  size may also be inaccurate.
Best wishes.

The
post operative size of a breast reduction patient’s breasts is determined based
on the patient’s desires and the dimensions of her breast.The amount of breast that is left by the
surgeon has to be sufficient to allow for a pleasing round shape and adequate
projection.In addition, in larger
breasts, enough breast tissue must be left to provide sufficient circulation to
the nipple and areola as they are moved to their elevated location.The patient’s breasts after surgery should be
proportionate based on the width of the chest wall, waist, and hip width.Though woman with large breasts are
frequently very anxious to have the maximal amount removed, I have had patients
come to my office after reduction, by another surgeon, desiring breast
augmentation.No sense going from feast
to famine.