Hey there, I am a 15 year old boy who has experienced pubic hair, facial hair, voice deepening, and physical growth. However, my penis is only an inch and a half soft and four inches erect. My penis has a girth of four inches when erect as well. A lot of guys are much bigger than me, and I wish it was bigger so it was easier to masturbate. Should I see growth, or will it stay the same?
You are NORMAL.
Flaccid size varies considerably. Erect, average for a 14-15 year old is 4-5", so you are there. Average for an adult male is 5.1".
Your penis can grow into your early 20's.
Don't compare yourself to others. We all develop at different rates/times. You also see other penises from a different angle than you do your own so you can't really compare size.
Hope it helps.