ridiculous discussion. anybody with any experience in this stuff knows that bigger hands are an advantage in striking, grappling, and anything combat and athletic related. ideally, big hands coupled with a large wingspan
so, you might ask if bigger hands are such a martial advantage throughout history, why do so many men have smaller hands? the reason is smaller, stubbier hands are evolved for very cold climates are more resilient to frostbite and freezing. stubbier bodies for that matter, are more suited for very cold climates. thus, a large percentage of the people alive today have those traits
as for Fedor? his hands don't look small, nor particularly large - and by large i mean how long his fingers are and the width of his hands from pinky to thumb measured. probably around average or slightly bigger measurements for a man his size. and he is not a very large man all things considered
with that said, anybody that has spent a good portion of their lives hitting pads, sparring, fighting or hitting a heavy bag knows that punching does make the bones of the hands and wrists more robust over time (but not actually longer and "bigger")
When I met Kevin Randleman (RIP) there was a poster with Muhammad Ali and Joe Frazier's real hand sizes. He put his fist up against it and was super annoyed that his hands were like half the size. I know he wasn't exactly a striker, but he packed a wallop when he threw them.
height, hand size, wing span, general bone structure...these are things that can not be changed no matter how hard a man works; and Randleman seemed like the kind of guy to work very, very hard in the gym. i can imagine it must be a frustrating thing to get frame mogged so heavily but...
...at the end of the day, it barely matters anyways as being smaller is actually an advantage in modern firearm based warfare and, if shit hit the fan with world wars, famines, etc. being a 5'3'', 130 pound Guatemalan man would be the ideal frame size for a man to survive