Allen,

Back when I was still fishing with conventional gear, I caught a lot of 10 to 12 inch largemouths on spinerbaits with 5/0 hooks in them. Sometimes you will catch little 12 inch fish when fishing with 10" worms (usually using a 5/0 worm hook). Small bass will routinely hit and be caught on 1/2 to 3/4 ounce jigs that feature 4/0 to 6/0 hooks.

A 2 pound largemouth bass will be a bit over 16 inches long. The oral cavity on such a fish will be about three inches across and open to about that in height, the depth when open will be a bit deeper than that. Thats a pretty big space. A bass will consider anything up to half it's body length as prey. Since they aren't too smart, being fish, they often err in this and I've seen bass try to eat prey much too big for them to swallow.

With typical bass fly gear, you can seldom throw a fly that will be 'too big'.

Buddy