This is Queen Mama Chanter compared with the Thousand Sunny
This is a height chart of One Piece characters, Sunny's head next to to Dorry the giant. From this site
A comparison with Oars and Sanjuan Wolf made by u/ikanx from reddit
Sanjuan and Marineford
And here is king's feat
King pushed back with his feet a ship that is easily much bigger than Marineford in his animal form which most of the time is the weakest form of a Zoan user. How would you calc this feat? How strong do you think King is?