Can a power forward be short?

Offcourse, look at Charles Barkley! The guy is 6,3 with no shoes on. And as far as i know Ruben Patterson sometimes plays pf as well. Dennis Rodman isn't that tall either, compared to other pf's. Larry Johnson, wasn't that tall, compared to other pf's. Nowadays, I think Maxiel (Pistons) is not that tall for a power forward.