My personal choice is size 2. It depends on the weight of your rig. I usually use 1/16 oz. jigs.
Which size Thill is the best for 1/16 oz jigs and minnows? Weighted or non weighted?
I've been looking for some sort of slip bobber or slip cork or anything that I can easily / quickly put on and take off of my line...never occurred to me to just use a regular bobber using just one eye hook. I have my 12 foot rod and I hate messing with setting it up when I want to slip bobber, vise versa when I want to just jig.
I would also recommend the Thills, but I use nothing but their wagglers for both fixed and slip float fishing.
I like the Mr. Crappie slip bobbers pretty well. They are really visible and hold up pretty well. Here's the link. Mr. Crappie slip bobber. Also use them with a good bobber stopper. I've caught many crappie with a slip bobber tight against cover.
"Many men go fishing all of their lives without knowing that it is not fish they are after." Henry David Thoreau
new to this area Barren River Lake, but back in central IL we used all but like the weighted thrill the best.