Thank you for the question. Unfortunately there are no such products which would enhance, increase or decerease the size as per one's need and requirement. The results that you could be looking for could be acheived only with a procedure called, BBL - Brazilian Buttock Lift, where in Body fat is transferredto increase and is shaped as desired. My advise would be to contact a board certified plastic surgeon and discuss your queries about the possiblitiesand your expectations.
Whether you are in India or not,there is no miraculous product like oil or food supplement that can help youenhance your butt. The only thing that can guarantee you safe and visibleresult is surgery for butt enhancement. Professional surgeons all over theworld follow standard operating procedure so that the procedure in India wouldbe the same as to that in the other parts of the world.