He was significantly bigger than Judah, but that's probably because Judah is a natural LWW like Floyd. I'd say he's got good size for the division, but I wouldn't say he's among the biggest.
He's got girth (no dick jokes please) but isn't that tall. In response to the thread starter, I would say Margarito was a monster of a Welter. Like Palomino and Cuevas. P-Dub was a different category; 'freakish' :good