For the sake of argument, I photoshopped a 5 time worlds strongest man into tychus' armor.
I did this based on where his head should be in the armor, and given that per the description the suit adds up to a foot to their total height. For reference, he has comparable stats to Tychus Findlay (well over 6 feet, 330+ lbs). If anything, Tychus exceeds his measurements.
There's no way he'd fit in the shoulders or hips. You can see that even with his arms out (they aren't even at his sides) and and his legs apart, hes still way shy of the suits dimensions. If his arms were not out and at his sides, it would be even more obvious. The armpit of the CMC suit hits him above his rotator cuff, and there is no head room to move up at all. I do think it's funny that the midsection is too skinny for this guys torso - his lats spill right over the exterior. basically the shoulders are way too high, the torso is way too short, but hey, his knees and elbows line up
I know it's like "wtf is this guy on??", but I'm just curious if anyone else has made the same observation.