How Big Would a Bird Be If The Feathers Were 3 Inches THICK Like This One (Looks like a Turkey)

I have a 3in thick feather and much much more…From the Home of the “Shocker DuJour”
Also I need HELP on identifying the Species of My Bird Friend Caesar Agoostus…
He is the 13 Caesar…
We have all the clues I just need some help.