Is a 600cc a good size to start with for getting implants?

Thanks for the question. I do feel that this implant will likely accomplish your goals of a C or D cup well. It is difficult to state without in person consultation, but in my experience with male and female transitions ( body types typically starting with minimal breast tissue) an implant ranging from 450-650cc is very common. Typically, the only regret I hear my patients say is that they wish they would have gone larger. That being said, it is important that you try on the sizers and love the size before you move forward with surgery.