Penis 14cm is a normal phenomenon. The normal value of the flaccid length of the penis is about 5~6cm, and the length of the erection is about 8~18cm. 14cm of the penis is a normal phenomenon, and the development of the penis is relatively good. The normal time of penile development is between 12~17 years old, after 17 years old the penile development has matured and the probability of growth is relatively small. The length of the body of the penis is less than 2.5 standard deviations from the average of normal penis length or adults generally take the length of the flaccid penis less than 3cm as a small penis, which is a congenital disease. After 18 years of age adult penile development has been completely finalized, in the process of penile development if the patient exists related diseases, the development of reproductive organs may be affected to a certain extent, such as phimosis, prepuce, local anatomical structure abnormalities, hormone level deficiency, chromosomal malformations and so on.