Collin will be 10 on April 5th, and is pretty tall for his age. His head is chest high to me, and I'm 6'1.
You can see Goku standing next to him in one of those pics....Goku is knee high to me, Susan says she can almost watch him growing while he is standing there. lol I don't think he will be huge, but then I didn't think Drago would be nearly as big as he is, either.