Thank you for your question whether you would be a candidate for butt implants on a skinny girl. I would suggest you would be an excellent candidate for buttock augmentation with buttock implants. Buttock implants are ideally suited for patients who desire buttock augmentation and who lack fat for a BBL. Since you have no fat, I believe your best option would be buttock implants. I would suggest a round implant for a more natural appearance of your buttock. In my opinion, an anatomic buttock implant would make your buttock look to “bottom heavy”. In your case, I would also suggest a round buttock implant of around 400 cc for optimal sizing. Typically, I place my patient’s buttock implants inside the gluteus maximus muscle. Therefore, when I place buttock implants, the buttock implants are not on top of the muscle or underneath the muscle. Placing the buttock implant on top of the muscle has the risk of excursion through the incision, rejection and a potential for flipping. Placing the buttock implant under the muscle has a high risk of nerve impingement. Therefore, during buttock augmentation, I place the buttock implants inside the buttock muscle. Also the size of the buttock implant depends on what your body can tolerate. If your buttock skin is very tight, it may not be able to accommodate a 500 cc buttock implant. An in person physical examination will be critical before buttock implant sizes are chosen. Thank you your question regarding permanent buttock augmentation with FDA approved silicone implants. I hope that I have answered your questions regarding the sizing and shape of a buttock implant on a skinny girl. I specialize in buttock implant insertion. If you have any more questions regarding buttock implants, buttock implant surgery, buttock implant insertion, or buttock implant revision, please contact my office. Since buttock implant surgery is a big procedure, please seek an experienced, board certified plastic surgeon with significant experience buttock implant insertion. Do your research. If you cannot find an experienced, buttock implant plastic surgeon in your neighborhood, consider traveling out of state if you must. Sincerely, Dr. Katzen. (“Verified” Plastic Surgeon, certified by the American Board of Plastic Surgery, Fellow of the International Society of Aesthetic Plastic Surgery, American College of Surgery, and International College of Surgery and member of the American Society of Plastic Surgery, American Academy of Cosmetic Surgery and RealSelf Hall of Fame.)