Yak hair is awesome stuff! When you mix bucktail and yak good things happen. Mixxed to about any color combo you could think of makes for some pretty creative ideas. These are 7inches but you can go way bigger. Tinsel flashabou on 5/o orvis pike and musky hooks makes this a great base to build on. I did an Irish version and a red and white daredevil scheme. I just love tying with bucktail and now I think yak is right up there on the list. Will be doing as per Dave with yak tail sub bugs so keep you pike eyes peeled flingers!!! Tight Lines!