Fly Fishing Glossary X's
Fly-Fishing can often be confusing to beginners to the sport because fly-fishermen talk and write in a strange language using words not always in standard use. To help take some of the confusion out of the terms bandied about by fly fishermen we have compiled this glossary.
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XX: archaic measurement used to designate diameter of leader material used in conjunction with a numeral, as in "4X". To determine the actual diameter of "4X" or any "X" number, subtract the numeral from the number 11 (eleven). The result is the diameter in thousandths of an inch. For example, to find the diameter of 4X material, subtract 4 from 11 (11 - 4 = 7) thus the diameter is .007". Important: diameter does not always correspond to breaking strength.
