Corkstock, well, not exactly. The Cork ATC Cards measure 2 1/2 in. x 3 1/2 in. and have a sticky back so it can be put onto a piece of cardstock, a baseball card, or whatever you want to use to start creating your ATC. (It has a peel off backing to expose the adhesive side of the card). This bendable cork adds that bit of texture to your artwork and can be stamped on, cut into shapes, punched or cut with decorative edge scissors. It can be colored with markers or blending pens. It can also be torn for a cool edge or background, and sewn or stitched. You will receive 10 Cork ATCs per package.