Thank you for your question. There are two common ways to enhance a buttock, but each requires surgery. The most common method is through the use of fat-grafting, popularized as the "Brazilian Butt Lift", or BBL. This procedure involves performing liposuction of diet and exercise resistant areas of the body (typically the abdomen, waist, hips, and back), followed by processing and purifying the fat before injecting the fat back into the glutes. This fat can be used to recontour the buttock region, while adding volume and firmness. The second method of butt augmentation is through the use of buttock implants, a better option for those with otherwise little body fat. A popularized trend in those patients not having sufficient fat for harvest is the use of Sculptra, a dermal filler, to help augment your buttock naturally by encouraging your own tissue and collagen formation to add volume, projection, and size. Injections of any other material is at best, unsafe, and at worst, can be dangerous to your health. Please do not entertain this option.Cost of surgery depends on a number of factors, including the type of procedure performed, the anticipated amount of time in the OR based on the amount of fat that will need to be harvested, the area of the country that the procedure is performed, and the facility where the procedure is performed. Price can range from 5K to 20K, with the average in the 10-15K dollar range. Though price is always an important factor, be sure to research your ASPS board certified plastic surgeon for their experience, knowledge, and professionalism. This ensures that you can anticipate the results you are going after. Hope that this helps.