I would say you are average, maybe slightly above average size. but I would have to say no you are not goint to grow anymore. I know my dick was full size at 18.
What is it with these people who have fluctuating ages? It seems creepy that there are older men parading as teens in order to get some kind of kick (not saying the OP is one but they are around).
It's above average length and perhaps average girth.