Is a 1 inch at 15 normal?!?

i'm 15 almost 16, im Bi, so the other day in was in the bathroom at school peeing and ive always thought i had a small (1inch), anyways mt friend Devin walked in and was peeing too, being attracted to him i looked down and saw his , it was about 1 inch too! is 1 inch normal for 15 almost 16 year olds? please answer..