Given your age, the most viable solution would be breast augmentation. If that is not an option, gaining weight is the only other way to possibly have bigger breasts. Of course, this measure can result in gaining weight in other parts of the body, too. Best wishes,Dr. JSB
At the age of 26 it is very unlikely that your breasts will get any larger on their own, unless perhaps you gain a significant amount of weight. Hormones can sometimes increase breast size but that is not a good reason to start taking hormones. There are some non surgical options like the BRAVA system which you can research on the internet. This system will increase breast size only modestly. Your surgical options include Breast Augmentation with an implant or with fat. These are all good options. I wish you the best in your research.