If you're interested in an imitating fly, as shown in many of the pictures, the yellow wings are significant. They stand out on the natural. An 8, 2XL is a decent hook. I use a foam strip going back along the hook, superglued on. Dub over with a creamy white synthetic dubbing like antron and pull the foam strip over the top of the body. This helps with floating such a big fly. I use a double-style wing. I start with a comparadun style wing in costal deer hair. When I get back up to the front after tying the body, I tie in a big grizzly hackle and wrap around the comparadun wing. Then I tie in a yellow deer hair wing facing back and wrap it back to the other wing to get it to flair and stand up. Don't use too much. Dub the creamy white at the head and finish by wrapping the rest of the grizzly hackle at the head. It's about the best version for functionality and realistic profile that I've seen. I actually do a sz. 10 hook and do a short, 1 segment longer extended wrapped/dubbed body around the moose mane tail. It increases the length by at least 1 hook size or more without the greater weight of more steel. But that's something I wouldn't inflict upon somebody.
Syl