Thank you, guys.
Those are cool bullheads. Thanks. Most max sizes say on PCF are subject to change and anyone can effect it by sending in the evidence - a photo of a fish with a measure tape next to it. While these cats are indeed relatively huge, it's hard to gauge as the anglers are doing their usual cheap trick. I wish they haven't. Or much rather, I wish they included a measure tape in the shot.
Good call, I didn't think to account for the fish being held at arm's length...
I did some digging and couldn't find any records of truly giant snail bullheads, although here's a picture of a pretty nice one (with tape included).
