size alone WONT get it done!
theres lots of really big men in the USA and abroad
the skinny ones play basketball
If just big was enough Evander would never have been HW champion
Julius Long is an example.
You gotta have skills! especially if you want to make it to 46-0 or so.
And beating Top rank crafty smart experianced boxers (like John Ruiz or Larry Donald) well,,,,that would really take something special!