Fly Tying Thread Blues | Global FlyFisher | The old aught system for tying threads (6/0, 8/0, 10/0) isn't really good. So the newer Denier system is much better, right? No, not really!
Deciphering Thread Size | Fly Tyer
Think Thread Doesn't Matter When Tying Flies? Learn How to Pick the Right Thread for the Job | Bass Pro Shops