Star Wars time.
To give a sense of scale, here's a light test with me (about 5'6").
He has these booster shoes that you can't see in the final shot. I'm pretty sure he's about 7' tall with them on.
I ran into Chewbacca (or Dart, if we're talking about the person under the fur) when I was recruiting, and he graciously agreed to participate in this project. In chatting with him, I discovered that although he technically fits the description of a cosplayer, he doesn't really consider himself a part of that community. Generally, cosplayers tend to focus a lot on anime, which really isn't his thing.
As if Chewy wasn't impressive enough (Dart made this himself), this isn't his only costume. He participates in a couple of groups that will make not-for-profit appearances for kids' groups and such. I'd say that's a mighty good use of a costume.