golden state art, 16x20 picture mats mattes with white core bevel cut for 11x14 photo + backing + bags (black, 25 pack) golden state art <b>note:</b> please unwrap the plastic wrap & flip the first mat over to see the actual color mat. <p>the re-sealable adhesive strip of the clear bag is below the opening of the bag instead of on the flap. our acid-free whitecore matboards are a 4-ply papermat that provide the aesthetic and design benefits of a bright white bevel., each sheet of mat board has a richly colored front surface, a white core and a white backing. it can be used for matting photos, art, and needlepoint. also great for crafts, backboards, signs, children's projects, and school projects. </p>