I would say 1/32 to 1/16, to say which one to use would depend on the weather I mean what wind conditions do you have for a fall rate, also time of year in spring I would probably be fishing a 1/32 and on a sunny winter day. I will go to 1/16 when the wind really picks up. Even on a cold day with no wind or no sun out vertical jigging and in the summer I will use a 1/16 vertical jigging or throwing at deeper structure on a hot sunny day.