I just now noticed the entry above mine. There are definitely hard to get a needle through. I machine sew them onto a backing using fabric from my quilt in the same way you put a binding on the quilt itself. It looks really nice. I don't like the iron-on kind because they have a plastic feel to them and are not flexible. I'm not sure they won't come off in the wash. I have washed printed treasures labels and the ink holds fast with no fading.