From my research, my assumption is with breast implants after you get an implant depending on the size you can upgrade your implant and go bigger. I want to get butt implants and I was curious if I get them one time say 400cc can I add another 400cc a year after my initial surgery, or is that not possible? What is the maximum size you can get for a butt implant? I'm 5'9 measurements 34-27-41. i don't think 400cc would be enough for my height.