Tippet sizes in fly fishing refer to the diameter of the tippet material, which is the final section of the leader that is attached to the fly. The size of the tippet is denoted by an 'X' number, with larger numbers indicating finer diameters. For example, 7X tippet is thinner than 3X tippet. It's essential to match the tippet size to the size of the fly and the fish you are targeting. Using a tippet that is too thick can spook fish in clear water, while a tippet that is too thin may break easily when fighting a large fish. It's a balance between stealth and strength.

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Fishing Gear Fly Fishing Leader Tippet Sizes