Guest over a year ago I am 15 years and 3 months old and my penis is I think 5.5 in to 5.9 in. How big will it get? Loading... Guest over a year ago Are you 5.9 inch on hard?Do you masturbate? Reply Loading... Guest over a year ago Maybe 8 inches? When your done Reply Loading... Guest over a year ago Have you had a blow job? Reply Loading...