Fly lines dimension numbers pertain to weight- the higher the number, the heavier the line. Heavier lines are utilized with larger flies as well as fish, and lighter lines are used for smaller sized flies and also fish. There are some convenient graphes available to help determine which line dimension they should be using.
That in fact raises an important point. A great deal of a fly fisher's "success" (even that is gauged subjectively) depends on their style as well as their ability degree. What could function perfectly for one may not work at all for one more. It is a fantastic idea to speak with people who have encounter and also have tried various things and have actually found what help them. Visit a local fly shop or ask concerns in online forums. Another excellent resource is the smaller sized online fly angling merchants. Usually the smaller business will take the added time to answer your questions and give recommendations.