School of Fly Fishing - Wooly Bugger Flies - 12 PC - Size 4, 6, 8, 10 - Colors - Red, Black, Olive, Brown/Red, Bead Head Olive, Bead Head Brown/Red - Fly Fishing Streamers Great For Rivers and Lakes. Fly size is often as important as or more important than color. Each package contains 12 flies, 3 each of hook size 4, 6, 8, and 10. Many fly fishers say that if they could only fish one fly for the rest of their days, the Woolly Bugger would be it. You can fish it at all depths and, if pushed for time, you can snip most of the tail off and fish it as a nymph. This is a classic pattern that is a favorite of trout and bass.