Dear Tiffy, Congratulation on your decision to have your butt augmented with implants, which is the only reliable and consistent way to get nice butt. The scar is placed low, between the cheeks and it is invisible. The implants size selection depends on your desire and your butt measurement. The biggest implants that I have used in my practice is 660 cc. Bigger implants can be used, but they are custom made , which increase their cost significantly (about $3000) . It also takes 2-4 weeks to manufacture them with special mold. You have to realize that not all results are the same, because there are different techniques and different implants. Additionally, experience, skills and aesthetic eye are critical for good outcome. So, do your due diligence carefully and choose your surgeon wisely, to avoid bad result and a need for corrective surgery. Always, consult with experienced board certified plastic surgeons who operate in accredited surgery center for your safety. Most importantly, check the before and after pictures in the photo gallery, to make sure that they are numerous, consistent and attractive with nice 'S' curve, nice projection, round hips and natural look. Best of luck, Dr Widder