As with traditional fishing, fly gear varies by size depending on your chosen location and the type of fish you are intending to catch. Fly outfits vary by weight from #1 weight, the lightest, all the way to up to #15 weight, which is designed for the largest fish. If you are a beginner, it is recommended that you start somewhere in the middle with an outfit ranging from a #4 to a #7 weight. Rods, reels, and lines are marked by weight to simplify your selection process.