Male penis length 5~8cm in the non-erect state is the normal level, and 8~15cm in the erect state is the normal level. Male patients penis in the non-erectile state 5~8cm is the normal level, erectile state 8~15cm is the normal level. When the non-erectile state is less than 5cm and the erectile state is less than 8cm, we call it short penis. The main time period of penis development is male puberty, in this time period, is the fastest growth rate of the penis, so in this stage must do a good job of penis protection to avoid excessive masturbation, because excessive masturbation will affect the development of their own penis spongy body, there may be a short penis. The length of a man’s penis may vary depending on his age, region, ethnicity, race, and physical condition. If you find that the length of a man’s penis is abnormal, you should consult a doctor in a timely manner, improve the examination, clarify the cause and diagnosis, and standardize the treatment under the guidance of a professional physician, so as not to delay the condition.