How do you know if your penis is a decent size? -

Is a penis size of 4inch in length and 4inch in girth pretty good size for someone still going through puberty?

Congratulations.....you re the millionth person on yahoo to ask if their penis is big enough

Definitely. A thicker girth seems to stimulate more of the vagina.

If you can encircle the girth of your penis with the tip of your thumb abd your fore finger, i think that s decent enough.

since you can t change that I don t see the point of measuring.