Hugo in USF4 makes all the swole characters already in that game look small. His arm alone is just as big as 80% of the cast. He also covers the life bars on the screen because he is like 8' tall. In SF3 he wasn't nearly as big on screen compared to other characters as he is now, I don't know why they decided to do that.
You're right. Hugo is pretty monstrously large.
Here he is crouching, still taller than the average height man in the background
Here he is holding an above average sized dude
And here's the mountain of a man, ALMOST standing up straight and still towering over dudes