One easy way to turn small bass into big bass is when you catch small ones, just snip a gill, throw 'em back, and a big bass will eat them.
I've seen so many "pond experts" say you should just throw them out on the bank...but that only feeds the coons and other scavengers. That's a complete waste. It takes an estimated 10 pounds of forage to add 1 pound of weight to a bass...so why waste that valuable forage it took to grow the small bass when you can easily return it to your ecosystem.
First choice would be to eat them or find someone who will but that isn't always a good solution when you have ponds. IMO, the next best route is to snip a gill and turn the small ones into big ones.