is it possible to even out an uneven breast without surgery?

It would depend of several factors but most importantly whether the asymmetry is simply a volume issue or if it refers to the shape of the breasts.  If you have a small volume asymmetry then perhaps some liposuction of the larger breast or fat injection to the small breast would fix a small degree of volume asymmetry.  However, you need an in person exam from a board certified plastic surgeon to determine your options.

Thanks for your inquiry, but without pictures it is impossible for us to advise.  In general short of massive weight loss or gain, pregnancy, or hormones it is hard to influence the breast at all and that does not necessarily take into account issues of symmetry.  

Thank you for your question. It is very unlikely you can do anything to change breast shape without some type of surgical intervention.

Thank you for your question. The short answer is no. If you have breast asymmetry, without surgery there is not a way to correct this. Most women have some small degree of asymmetry which is normal. To correct it many times a breast lift, breast augmentation or combination of the two is used. Even after surgery you should expect some degree of asymmetry. Surgery is both a science and an art. Nothing is perfect, especially when correcting asymmetry. Make sure you see a board certified plastic surgeon to discuss all of your options as well as the realistic expectations when correcting asymmetry.

The answer is no, if you have significant on evenness it is not possible to even breasts without surgery. Even with surgery it will never be perfectly identical but they would be much much closer. I would recommend you find a board-certified plastic surgeonby the American Board of plastic surgery and be evaluated of what your options could be. Best of luck