These decals are made of .007” clear static stock made for glass. They use no adhesive and still hold the decal firmly in place. They are available with front or back cling. They come in 4 Different sizes 5.1-9 square inches, 9.1-13 Square Inches, 13.1-18 Square Inches, and 18.1-23 Square Inches. Completely Customizeable so get Creative!