A fly fishing technical posting about terminology in leader/tippet sizes. I’m always willing to share most, some…a few of my foibles. Either I am anal retentive or suffering from some degree of ADD or a combination. I have never cared enough to memorize the chart that tells one what approximate pound test matches what X number for leader constuction. Maybe it started when I read the disclaimer that different manufacturers had different diameters hence the charts were approximations. Well, hell, why bother. Well, you have to bother because the industry seems to care about the traditional X numbers for some reason (I was one of the slow ones sitting in the back of the classroom). So, because apparently I need to know more than 8x is cobweb and x1 is for steelhead, I am including a few charts for a Spring refresher. I spend a lot of time in the 4-6# range…no, the 5x-3x range.