What a normal p**** size for a 14 year old??

Hi I'm 14 and a half... Last week I measure myself and it says I'm just barely 3 inches when hard... Other guys I know sya theirs is 6 inches or even more... Which is twice as big as me. Are they lying... If not then does is mine not normal??? Does it still have time to grow?? What if it doesn't grow??