Saldydog, the jig size varies greatly in accordance with the current, depth, wind, and size of bait. The drop off I was pitching went from 6′ to 18′ quite sharply. With a 20-35 mph quartering crosswind blowing on my line, I was using 1/2 to 5/8 oz jigs. On that same drop without wind, I may have gotten by with a 3/16th oz. jig.
The key, especially in post cold front conditions, is to present the jig/bait or jig/plastic in a fashion that closely resembles the natural pattern of movement for the bait. I generally impart very little action, just enough to loosen the jig from any hang up, then let it drift.