So I’m 14 years old and all my friends have clearly hit puberty before me. I’m about 2 1/5 inches when flaccid and 5 inches when erect. It’s also only 1 inch wide? Am I too small?
No. You are bigger than average for a 14 year old, about 4" erect, and almost average for an adult, 5.1" erect.
Girth comes in later.