Can a 36C be reduced to a 34B for a 5ft girl?

Hello and thanks for your questions.  You can most definitely reduce your breast size from a C to a B.  However, without body contouring/liposuction, you will not be able to decrease your chest circumference from a 36 to a 34.
I would encourage you to schedule a consultation and discuss your breast enhancement treatment options with a Board Certified Plastic Surgeon certified by the American Board of Plastic Surgery (ABPS), who is a member of the American Society of Plastic Surgery (ASPS), and also a member of the American Society of Aesthetic Plastic Surgery (ASAPS), and a fellow of the American College of Surgeons (FACS) demonstrating their commitment to cosmetic surgery and excellence in surgery.  Assure that they have multiple before and after photos of results that you like so that you can have an informed discussion about your breast reduction/body contouring procedure and possible results.
Best wishes!
Daniel Brown, MD, FACS Diplomate, American Board of Plastic Surgeons MemberAmerican Society of Aesthetic Plastic Surgeons MemberAmerican Society of Plastic Surgeons Real Self Top 50

Thank you for the question.  Yes, what you are describing can certainly be done.   Ultimately, careful selection of plastic surgeon and careful communication of goals will be key.

  Before undergoing the breast reduction procedure it will be very important to communicate your size goals with your surgeon (who you should choose very carefully). Most patients wish to achieve enough of a reduction to help with their symptoms while remaining proportionate with the remainder of their torso. 

With the goal of improving communication with my patients I find the use of photographs of “goal” pictures (and breasts that are too big or too small) very helpful. For example, I have found that the use of words such as “natural or proportionate” or “B 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. 

Once you have communicated your goals carefully, your plastic surgeon will be able to provide you with an estimation of how much tissue will need to be removed, in order to achieve your desired outcome.

Best wishes with your breast reduction procedure; hopefully you will be very pleased with the outcome of the procedure performed.

Dear breastreduction101,iIf you are considering a surgery, I would suggest you to consult a board-certified plastic surgeon. Only after a thorough examination you will get more information and recommendations.Daniel Barrett, MD
Certified, American Board of Plastic Surgery
Member, American Society of Plastic Surgery
Member, American Society of Aesthetic Plastic Surgery