I'm sorry to hear about the physical problems your disproportionately large breasts are causing you. It is probable that you are dealing with juvenile breast hypertrophy. You are wise in achieving your long-term stable weight prior to proceeding with breast reduction surgery. In my practice, timing of breast reduction surgery is determined on a case-by-case basis. It is not too early to do your homework and learn as much as possible about breast reduction surgery and the potential risks and complications associated with the procedure. I hope that you have the support of your parents as you do your homework. It will be important that you learn about the potential risks/complications associated with breast reduction surgery. Unsatisfactory scarring is one of the potential complications. Make sure you also understands that further surgery may be necessary in the future (for example if the breasts were to grow in size again). On the other hand, breast reduction surgery is one of the most patient pleasing operations we perform and I think that for the right teenager (enough symptoms) it may be an excellent option (regardless of the age). Online consultants will not be able to predict exactly what bra size you will end up wearing; it will be important for you to communicate your goals carefully (be careful of communicating goals in terms of cup sizes) prior to proceeding with the breast surgery. In my practice, I find the use of goal photographs and computer imaging very helpful during the communication process. I hope this, and the attached link (dedicated to juvenile breast reduction surgery concerns), helps. Best wishes.