My mom made these all the time when I was growing up. They were served as appetizers at almost every single holiday meal. I make them myself these days, but they're so simple to make that I whip up a batch or two several times a year.
Creating this pocket at the beginning means you don't have to be so precise in the length of the binding at the end. Tuck the end in the pocket, sew it down, and once it's folded over and hand sewn to the back, you can hardly tell where it joins!