Jeradm2525,
One of the rules of thumb for leaders I learned years ago was to take the size of the hook and divide it by 3, size 12 hook / 4X leader ect. I use streamers down to size 16 ( Little bait fish patterns ) and I use a 5X leader. As far as lenght I go by water clairity. If the water is clear I use a longer leader. If muddy I use a shorter leader. I use all Frog Hair products for their strength. Play around with it the rules are not written in stone. Best Fishes Mike