Shark Scuba Diving Trucker Hat: Mens Adjustable Snapback for Fishing, Spearfishing

How is the size? would it fit a larger head (depth, low brim)

Is thi cap a trucker or a snapback. The answers to the previous question said snapback but the title says it is trucker.

So is this flexfit or snapback? Never seen one that's both, and can't tell from pics. Looking for a flexfit/closed back trucker

Can you give a range on "one size fits most?" I usually wear a 7 3/4" hat on this huge head. Most of these type hats do not fit