This claw is pretty big. I bite my nails so I’m really not sure how big they get😛😁 that claw is about 4” long so maybe. I’d think a mature grizzly would have claws that big, but I’m not 100% sure. Either way, bears do have a lot of power behind whatever sized claw he’s got.....wouldn’t want to be on the receiving end of it that’s for sure✌🏻