Aka, Ray was naturally thinner while Hagler was naturally stockier.
You're right. So, Sugar Ray Leonard was actually taller than Hagler.
My point though, is that SRL is naturally pretty close in size to Hagler. Mayweather and Golovkin are nowhere close at all. Making the "SRL fought Hagler, and Floyd won't fight GGG" comparison nonsensical.
I was actually pointing out how small Hagler was the other day to someone. By today's standards, Hagler would be considered a small middleweight, and actually more of a super-welterweight. The guy was close to 5'8 and routinely weighed-in a few pounds below 160. He probably only fought at middleweight because that's a bigger money division, and a more historically celebrated division than 154.
A guy like GGG or Martinez would be significantly bigger than Hagler in the ring.