i ship world wide with u.s.p.s. flat rate priority mail. i have to put fragel and photographs please do not bend on the envelope. you can not stamp a flat rate envelope because it will not dry because of the water proofing they put on the envelope. i stamp these labels and they dry instantly and are ready to stick to the envelope dry and smear free
I print labels for some products that I ship and when I try to apply the label to the curved surface of the jar the label stretches with the slightest pulling and causes wrinkles. So it does not totally flat but has wrinkles at the edges where I was holding it with my thumbs. I did not have this problem before with your product so I can only believe that you made the labels thinner than before.