First, if you examine anyone's face, you would likely find some degree of asymmetry, i.e. one side larger than the other, higher or lower than the other, etc. So, it is not always necessary to chase after creating an elusive symmetry. However, the degree of asymmetry noted in the photo provided does support treatment. Fortunately, the use of a volumizing filler, such as Voluma XC, which I would choose for this in my NY practice, can be helpful for augmenting the cheeks and posterior angle of the jaw, which should take no more than ten minutes to achieve and should go a long way to achieving greater balance between the right and left sides of your upper and lower cheek regions. In my Israel satellite facility, where a far greater number of regulatory agency approved volumizing fillers are available, I would choose Stylage XXL for the upper cheeks and Restylane Volyme for the posterior angle of the jaw area. Results may last up to two years in the upper cheeks and about a year plus in the more mobile region of the lower face. I personally stopped using fat injections many years ago, since the results of these did not prove to last significantly longer than off-the-shelf injectable fillers, was more expensive, involved two minimally invasive procedures--one to withdraw the fat from the buttocks, abdomen or hips and the other to reinject it via large bore cannulas into the face--and finally, since fat retains the properties of the region from which it is taken, the possibility exists that with aging the transplanted fat may "put on weight" the way those areas from which the fat was taken typically do with the passage of time. Make sure that you consult with a board certified aesthetic physician. Best of luck.