Water Temperature, depth and wind have everthing to due with jig size and fish activity. The more real the jig looks the better you will do. Early in the season bait fish tend to be smaller and as water heats up large bait fish are more plentiful to hungry crappie. I tend to use much smaller baits and weights in colder water and as the water heats up I tend to use more weight taking wind and depth into consideration. If I am throwing a cork into the shallows I almost always use 1/32 as it tends to fall slower giving more time for a strike. If I am spider rigging in a shalow lake I will use 1/32 to 1/16. When I fish deeper water or experience wind in spider rigging I use 1/16 and 1/8 and sometimes add more weight to the line to see strikes from finiky fish. Hope this helps and any other comments are welcome.