Fat and thin, most people observe and judge with the naked eye. Judging from the pictures, both of them are neither fat nor thin, and they are in good shape. Only the left one is stronger and the right one is thinner. However, whether a person is fat or not can't just look at his appearance. Some people are big and easy to be seen as fat. But not necessarily fat. Some people are thin and easy to be considered thin. However, it is not necessarily really thin. The standard of obesity is not determined by the size of the body, but by the fat rate. The scientific method is to go to the hospital for personal fat examination. If it's too much trouble, you can also buy an individual fat scale and weigh it barefoot. This judgment method is relatively simple.