stone layed some of mine out with a tape. Most of my flies end up between 3 to 4 inches.maybe slightly longer depending on wing length etc. The nice thing about intruder style flies is the ability to simply change out the hook. I usually start with a size 2 owner or gami octopus, but as season progresses and more nates show up I bump up to a 1 or even 1/0. I also use jewelers braided wire for the stinger. This keeps the hook straight out from the fly. No sagging and less of a chance of your material fouling. The bottom 2 on the left I intentially tied very sparce, however the rubber legs will flow back around the hook. If I see any fouling on the river, I can just trim them up a bit. Those may be some of the flies that look to have the hooks hanging way back. Take all this with a grain of salt though. This is only my 3rd winter swinging for steel and I have much to learn.