A pre-pubertal boy will have a flaccid penis of around 1 inch.
Dude.... why are you thinking about 11 year old boys penis'
The average length of a seven-year-old boy's penis is between 2 and 2.8 inches when erect.
It varies from boy to boy as different boys start puberty at different ages and the growth rate of their penis can also vary from boy to boy. The right size for you is whatever size it is.
8+ is big
At 23 you are not a boy anymore but an adult and the average size for a man is 5-6 inches.
Average size is around 5 inches.
7.2 centimeters when soft