PhotoPOSTOS - Self Adhesive, Acid-Free Blank Postcards - Now you can make your own custom postcards by applying PhotoPOSTOS self-adhesive photo postcards to the backs of your photos of landscapes, paintings, sculptures, quilts, a brightly painted chair, a cheerful sidewalk chalk drawing, and other great artistic masterpieces. Your custom postcards can be a terrific way of keeping in touch all year round, promoting a project or show opening, sending a perfect thank you, and brightening someone's day. Use as is or embellish with eyelets, stamps, stickers, glitter, and creating very clever mail art too! They're easy to use and fun for the entire family. Perfect for reinforcing thin, digitally output postcards as well as traditional 4x6 inch photos.