When it comes to bluegill and oter panfish, I am a big fac of size 12 hooks. Why? Because the hook-up rate is higher.
Sure, you can use larger hooks, say a 10, 8, or 6.
But panfish come in a variety of sizes, and the smaller ones are less likely to be caught by size 6 than a size 12. Your bobber will drop or your popper will vanish, but the fish will get away.
I relearned this lesson yesterday, when I ran out of size 12 poppers. With no other choice, I put a size 8 hook popper on my line and began flipping the fly out. I caught fish, including a whopper of a pumpkinseed. But again and again smaller fish battered the fly and did not connect.
Not to belabor the point, but….. I cannot tell you how many times I have seen novices trying to fish for bluegills and the like with hooks that are sized for bass or small catfish. They get frustrated as fish pick the worms off their over-sized hooks, and complain aloud about not catching fish.
You can save yourself much misery if you follow this simple rule: hook down if your bait is being stolen.
To be sure, the “size matters” rule goes the other way. You do not want to fish panfish with tiny hooks, say size 16 or higher. Those hooks can easily disappear down the gullet of the fish. Then you will struggle to get the hook out of the fish, the fish will leak blood, and you might end up with no hook and a dead fish in hand.
Do yourself a favor and print out a copy of a hook chart, like the above one from Mr. Fisherman. Hook size matters for all fish, not just bluegills, sunnies, and pumpkinseeds.