Economical, decorative pre-cut mats boards in a large variety of sizes including square mats and panoramic mats. Available in a large range of colors and are suitable for most everyday matting needs. Economy pre-cut mats are 4-ply, 1/16" thick and have beveled cut openings. These photo mats are buffered pH neutral (acid free mats, non-conservation). Mats are listed by Outside Dimension (Frame Size), not photo size.