60% of toal desired leader is butt section (30lbtest) 20% of total leader lenght is mid section(20Lb test) 20% of total leader length is tippet( 12lb test)

For a 7.5 foot leader: butt would be 4.5 feet,mid section 1.5 feet & tippet 1.5 feet

For a 9 foot leader: butt would be 5.4 feet mid section would be 1.8 feet and tippet would be 1.8 feet

We fish with floating lines and fish crayfish or streamers on the bottom so we fished 9 foot leaders to help get down to the bottom .

If you are fishing on top a 7.5 leader is appropriate

Tie your flies on with a non slip mono loop to give your fly more movement

For a 4 or 5wt taper from 20lb to 12 lb to 6 or 8 lb test