I've seen pictures of Pacquaio way closer in height to Oscar than that. Also Pacquaio is further away from camera, NOtice HOpkins who was way taller then Oscar in their fight? He looks the same size as Oscar because he is further away from the camera when he is actually 2 1/2-3 inches taller then Oscar.

Mayweather has been been measured height wise from 5'7-5'8, He didn't look any taller then Judah who is 5'7

Pacquaio is 5'6 1/2 which puts the height difference anywhere from 1/2 inch to 1 1/2 inches. Pacquaio is the same height as Hatton, and Hatton didn't look that much shorter then Mayweather.

As for size at every weight class they have been at Pacquaio waist, chest, legs, have all been bigger. Of course Mayweather who pumped up for welterweight would be bigger when comparing him at WW to Pacquaio at lightweight, but they still weighed around the same weight regardless. If Pacquaio is about an inch shorter then MAyweather and weighs in 5-10 pounds heavier then Mayweather at WW then I would assume he's the same size if not bigger, Hatton weighed in at 160 against Collazo, and he weighed 155 to MAyweather's 149 (according to outside soures) in their fight. Hatton IMO looked broader then Mayweather

People seem to be ignoring the fact that Mayweather isn't a natural WW, people wondered if he would even be effective at 140 after his Jose Luis Castillo fights because They thought he would be TOO small.