How big is a normal penis at age 13?

At the age of 13, the penis is normally 4-6 cm.

When entering the age of 13, the penis length of boys should be between 4-6 cm. The penis length of boys is related to personal constitution and genetic factors. The penis of boys generally begins to grow at about 12 years old. As the age continues to grow, the penis and testicles will also increase. It is an important response to adolescent growth and development. The length of the penis is measured from the back of the glans to the root of the penis.

The daily family should pay attention to the diet of boys. Eat chicken, fish, lean pork, shrimp and other protein-rich foods to provide nutrition to the body and promote penis development.