I have been tying Rangeley featherwing streamers for 40+ years. If you are looking for streamers to fish then the 4X or 6X is a great size. If you want to tie for pure enjoyment try the Mike Martinek "Carrie Steven's" 8X and 10X size 1 hooks made by Gaelic Supreme. Once you tie a few of these big flies for trolling or framing....you may never want to stop.