Believe me, it's real. Can be two times but up to eight (!) times the length depending on the penis (and its flaccid state).
When i say my flaccid penis would be between one and two inches it means it can be about two inches long which is the case most of the time but also there are times it is no bigger than only one inch. That's when i haven't had sex or masturbated for a longer period of time, am coming in from a cold weather, etc. But in the end it makes no difference in my erect size. That's always the same, no matter if i start an erection from a two inch or one inch flaccid penis.