Once again this year, I used the Avery 8660 pop-up edge mailing labels. I have to admit that they make me smile. I say that because not only do they look classy (they disappear on the envelope, but they also peel so easily, and adhere so well. We mail about 125 holiday cards each year, and they make my job so simple. Twice, I did not place the label "straight on the envelope". In each instance, they easily peeled back and re-adhered beautifully, and securely. Thanks Avery for such a quality product.