As stated for DRY fly fishing 2 and 1/2 to 3 feet of tippet on a 9 footer. I don't fish droppers or nymphs/streamers. Tight pocket water, wind etc., I suggest you cut back to a 7 1/2 foot leader then ...
Tie on a 2 1/2 piece of 20-30 lb mono to end of fly line with a nail knot. Tie leader butt section to this with a blood knot. ALWAYS tie on a tippet 2/1/2 to 3 feet long o ...