There is a constant perception that anybody can get a large behind based on his or her expectations. People search the Internet and claim to have had 2000 cc of fat injected into each buttock. There are surgical considerations as well as anatomical considerations that completely contradict these claims by both patients and surgeons. For example, the first thing that you need realize is that how big your buttocks is going to get has nothing to do with the amount of fat that you inject. In other words, if you inject a 1000 cc, your buttock will be much bigger than somebody that has 800 cc. When it comes to buttock projection, many factors like the tightness of the skin, how much projection you have before surgery, the anatomy of the muscles, among others, ultimately will determine how much projection you are going to get. Just because the perception of higher number of cc translates into a bigger buttock, that does not necessarily translate into a bigger behind when it comes to surgical implications of buttock augmentation. In addition, when you inject fat, the fat is alive. It is not a static implant like a buttock implant or a breast implant. When we inject fat in the buttocks it needs to be done in such a way that you inject the maximum amount of fat to avoid complications and improve fat survival. When we inject fat in the buttocks, the fat needs to have a recipient bed with a rich blood supply to survive. If not, the fat will be reabsorbed, and in some cases it can turn into fat necrosis or dead fat. In other words, the more fat that you inject in any particular area, the less chance that fat is going to survive, because the buttocks has a specific space. Think about it like a cup of water. You put enough water until the water spills out, same thing with the buttocks. It is not that you can inject fat indefinitely without having surgical consequences like increased complications of seroma, fat necrosis, and increased rate of fat reabsorption. For example, when you inject fat in the buttocks, there is an increase in the pressure around the soft tissue, and the skin expands to reach any given projection. As the skin spans outwards, there is more pressure that causes the fat to spill out through the incisions that we use to inject the fat. So one of the endpoints of buttock augmentation is if the surgeon notices the fat is coming through the incision after significant amount of fat has been injected, this is a tell-tale sign that enough fat has been injected and the buttocks itself has reached its capacity. You need to understand that it is not that you can choose any given number when it comes to buttock augmentation, same way with breast augmentation. The bigger the breast, the more complications you are going to have due to soft tissue interaction that is out of the control of the surgeon. Be careful of what you wish for. Just because your friend got any given amount of fat, that does not mean that you are going to get the same amount. It does not mean that the more fat you get the bigger your butt is going to get. Complications will occur secondary to injecting more fat that the buttocks can handle. That does not mean that a 1200 cc is not possible, but it depends on each patient individually. Somebody that is really small is not going to be able to handle this amount of fat. Somebody who is completely flat with a very small bottom, the skin is not going to stretch to the level that you want. Setting expectation and understanding of the surgical implications as well as the reasons of having an increase in buttock projection with surgery is important. This will help you decide what size of the buttocks you can realistically accomplish, while decreasing the complications rate.