Average penis length is anywhere from 5-7 inches…90% of the population has this. Same with girth…90% of the population will have around 5” girth. This is all considering non-PEers.
Anyone who has been here for a while is probably a fairly well-seasoned PEer…so don’t take into consideration the “average” here…it’ll be larger than the average for non-PEers, obviously.
Basically, your 9-inch-long brother is a true rarity. Being born that long naturally is just him being lucky. Remember, the penis grows independently from the rest of the body…that’s why many people in the same family will have sizes ranging all over the place, so don’t feel bad about it man.
Now to your cock…it’s alright…it’s just regular…but that’s not bad…it’s better than being undersized…it just means that if you want to be more than “regular”, “average”, etc…you’re going to have to join the little legion of PEers we have going here… :) …and besides, who knows…if you PE for long enough, you might top out at 9” length and then you can tell your brother “I was a late starter”… :D
Have fun. :)