Would it be reasonable to go from 38H down to a full C cup? I'm 5'3" and weigh 155lbs.

This size changes easily accomplished. I don't think any antecedent weight loss will have much effect on the operation.

At
size 38 each 200 grams corresponds to 1 cup size change.You would require 1000 grams removal from
each side to achieve a 38 C.This size
may be disproportionate for your body and may look inappropriately small.I recommend a new technique called The
Ultimate Breast Reduction™.The breast
tissue is reshaped creating upper pole fullness, elevated higher on the chest
wall and more medial to increase your cleavage.The weight of the breast is transferred to the underlying muscle
resulting in immediate pain relief without excessive reduction.This technique avoids the ugly vertical scars
of the traditional technique, maintains nipple sensation and the ability to
breast feed.Best Wishes,Gary Horndeski, M.D.

Hi - without seeing you, or photos of your breasts it is difficult to give you comments other than generalizations.  Cup sizing is VERY variable, so I never guarantee what cup size a patient will be after surgery, but use it as a guide as to what you would ideally like to be.  For you it sounds like a very reasonable size and goal from your surgery, though.  As a surgeon, I would also try to make your breasts of a size that suits the rest of your body - conscious of the fact that you may lose some weight after the surgery & also lose a small amount of breast volume too. Try to find a surgeon that you can have open discussions about your aims with.  All the best with your journey.  Regards Kim Taylor

Being super large means you can not get super small. A "C" may not be reasonable if you are that large to maintain a good shape.  Best to be seen in person to be properly evaluated.

You should be able to accomplish your goals with a breast reduction.   A weight loss of 15 pounds would most likely have no effect on your breast size.  

Thank you for your question. While going to a C cup is reasonable, if you lose a significant amount of weight after a breast reduction, your breast size will also go down. This may in fact take you down to a B cup or less with significant weight loss.  You may want to consider going to a D cup  and losing the rest with diet and exercise.  Once you have been reduced, the only way to go back up is with an augmentation so it may be a good idea to be a bit more conservative about the reduction.  You don't want to over-reduce the breasts. Best wishes.

Weight loss and large breasts go hand in hand. Many of my patients present with large breasts and a weight problem that they cannot seem to control. A big reason for the weight gain are the large breasts. The large breasts interfere with physical activity, add to back and breast pain and make people far more fatigued. So large breasts are part of a vicious downward spiral - Large breasts lead to weight gain which leads to larger breasts which leads to more weight gain.Breast reduction surgery breaks this cycle. Many times, After a breast reduction, my patients find it easier to lose weight and the cycle reverses.In your case, your only concern should be that when you go smaller due to weight loss, your breasts will shrink as well.For more information, read my book " Cosmetic Breast Surgery- A complete guide from A to double D".