The concept of male bust 100 is normal and belongs to the strong type. According to the inquiry, the normal chest circumference of boys has a great influence on their height, weight and age. Obese bust will exceed the standard in different lengths, while thin bust is naturally smaller. The bust of a normal person is 85- 105cm, which is normal for different people. Pay attention to daily maintenance, strengthen exercise, control obesity, avoid being overweight, and maintain an ideal weight.