someone already mentioned it, I think, but I stitch two sides of my label in when I sew the binding on, making sure to fold under the two unsewn edges. Then I go back and hand finish the other two edges. However, I don't like handwork very much, so figured out that I can make a triangular one with less handwork required by cutting a square of fabric and folding it on the diagonal to make a triangle. I sew the two raw edge sides into the seam when I sew on the binding, then have only one side - the diagonal one - to sew by hand.