pick any height say 5'6 and all national level.even playing field u can have a lightweight,welter,middle,lighheavy,heavy weight,all at that height 5'6 with various degrees of size and thickness,the light heavy and heavy's at that height of course will be big as a house.so its all relevent at that point.height has no bearing ,muscle to actual structure and ability to hold it has more bearing,,,