There are a lot of boys who start becoming aware of their sexual parts when they reach a certain age. Some of them cannot help but compare the size of their penis. The average penis size of a teenage boy may be smaller as compared to adult size. They still want to know if they have an average penis size, though. The average penis size will be about 2 inches to 4.7 inches, but it may be bigger, especially when it is fully erect. It should also be remembered that there are a lot of things that can affect the size of the penis, such as genetics. Sometimes, it runs in the family that male members of the family will have bigger or smaller than average penises.
The correct answer to this question is 3.5-4 inches.
This size for a 13-year-old will be temporary because as he grows, he will go through puberty. Males go through puberty until they meet the age of 17. Even if just a small amount, puberty will make the penis size increase on the young factor. Along with puberty, there are a number of factors that can affect the size of a penis. One other factor is genetics. The size of the penis could just be a matter of genes that have been passed down from generations. Another factor is the environment in which the male is in.
It will always depend on the 13-year-old male whose penis size is being measured. It will always be different for different boys. There are some boys who have naturally long penises, so it is possible that even at the age of 13, they already have 6-inch penises that will grow bigger when they get older. There are also some people who will not have huge penises at 13 years old.
Most men will have bigger penises when they get older, but there are also some whose penises would stop growing at a certain age. Genetics will also play a huge role in this. Those whose families would have small penises might have offspring with small penises too.