That is a very interesting question! Considering that the average penis is about 6 inches long (lil’ more than 15 cm), it has a lot of extending possibilites. You can get your penis to be 7 - 8 inches long (up to 20 cm)!!

What helps you are penis pills that enhance your manhood with combination of penis stretching tools and self stretching methods that you can find free on the internet.
So, the definite answer to it - YOUR PENIS CAN GROW from 1 to 2 inches. And I’m quite happy with that! Are you?