Determining the amount of fat for Brazilian Buttlift is hard to say. This will require a comprehensive consultation with the patient. The amount of fat for the buttlift depends on how big you wish to have. Also, this also depends on how much fat your body have to harvest for the fat grafting to enhance your buttock. You may desire to have a FULL buttock, but you do not have enough fat to harvest. Therefore, this will not be a realistic expectation, you may require to go with buttock implants. The most important step is to come in for your consultation so you and your plastic surgeon have a comprehensive consultation and examination to see if you are a good candidate for Brazilian Buttlift via fat graft injection or gluteal implants.