AKScott: Each braided and knotted fringe on my plaid is 3" long. They are separated by about 1". I suspect my plaid is coarser than yours, because you expended a lot more time and effort purling, instead of braiding. I will try to post a picture as soon as I can find a web server for my .jpg images.

As you may have surmised, I was wrong in my previous posting writing that some threads were not included. They are all twisted into a nearby braid.