The so-called standard weight is standard and scientific for most ordinary people. Of course, there are people with small bones or big bones, and the standard weight is not standard or reasonable for them. But at present, in the absence of the standard weight of people with different bones, we can only refer to the so-called standard weight, because the standard weight has upper and lower limits, the weight of small bones reaches the lower limit of the standard weight, and the weight of large bones reaches the upper limit of the standard weight, which is similar to that of ordinary bones.

Moreover, the current "so-called standard weight" is out of step with the times. Some people think that the modern standard weight should be reduced by one level. For example, before the 1960s, TV and movies were not popular, while stage plays and dramas were the most popular. People watched the actors on the stage from a distance. At that time, people thought actors with big faces were very beautiful. At that time, they were called apple faces because they were too far away to see clearly. Nowadays, with the popularity of TV movies, people rarely go to the theater to watch stage plays, but the small face under the lens is clear and beautiful, and the big face under the lens cannot be close-up. So small face and knife face are very fashionable now.

The same is true of weight. People in different times have different aesthetic views, which are the products of the times.