The average erect penis size is anywhere from 5 to 6 inches. So, in centimetres that would be 12.7 cm - 15.2 cm.

You're 15, however, so you have much growing to do. In addition, it also depends on your stature. If you're on the shorter end of the scale, generally, you're going to have a shorter penis.

Many, Many women will tell you that size doesn't matter. It's all in how you use it.

In my opinion size does matter . Though how to use it is more important than the size .

What do you base that on? Makes about as much sense as saying a short person cannot have a big nose.