Are you telling me that a whale shark is stronger than a Krakken? I am not buying into that. And while size isn't the most important factor in determining one's strength, I would definitely disagree with this statement: "If OP has taught is one thing its that size REALLY doesnt matter". Among wild animals at least, size DOES matter. Also there is something to be said about the physical stature of humans like Whitebeard, Admirals, Garp, Sengoku, Kong etc. Of course there are alot more exceptions amongst humans, but Oda definitely likes making alot of strong characters big.