The real name for it is “picot”, and it’s described by Wikipedia as a loop of thread created for functional or ornamental purposes along the edge of lace, ribbon, crocheted, knitted or tatted material. These loops vary in size, according to their intended function and to their creator’s artistic intention.
So, the point of this post is to defend my reasons for allowing the chain link fabric to extend above the top rail. I have an affinity for antique lace and have collected pieces using techniques such as Kenmare, Brussels, and Point de Gaze — all of which have unusual picot edging. Now do you understand that naturally I wanted my chain link fence to imitate this antique art form?