Is it normal to have a 7 inch penis at age 14?

The average penis length for a 14-year-old boy is between 2 and 4 inches (5 and 10 centimeters). A 7-inch (18-centimeter) penis would be considered large for a 14-year-old boy. However, every boy's body is different, and penis size can vary significantly from person to person. If you are concerned about your penis size, it is best to talk to your doctor.