Bass Bug, I would say no less than a 7wt, and an 8 wt would be the best smallest size. I have an 8wt, but a 9 or 10wt would really be good. I cannot use more than an 8wt, unless it is a good one. My 8 wt gives me a back ache after a while. You can also make this fly with saddle hackle, and bucktail, lead with no lead eyes...just stick on eyes...and it would be lighter. That one is called a Spinster. You can also make a Jig Hook Clouser, and that would work really well for now. (without the spinner) I will make these down to a size 4, which should be good for a White Bass or Hybrid Striper too. I hope the lead eyed fly casts okay with my 8wt. If not someone will have to take these flies lol....