Everyone says they are "around 8", not many people are. That applies here and also in the real world. When I was in my teens, 8 was the magic number.

As for ostracism, if you live in America then you are within the cultural norm and most people would be accepting/not comment on your penis. If you live in Europe, you could be in a minority.

However, it shouldn't matter to anyone since anyone getting close enough to see your penis probably cares about you enough to not care/accept it. And the people that do make a fuss about it aren't worth your time.