Like Salty says! I do a ton of tying and I hand select all my tails. I'm looking for a particular texture and character in the hair so that my flies move naturally in the water. I want to know that each fly will be the same in the water.
Here's a picture of some long black tails I tied. This what you're looking for? Bottom one is about 8" long. Top one is closer to 14" long. All from same saddle....