Golden State Art, Pack of 20 12x16 BLACK Picture Mats with White Core Bevel Cut for 8x12 Pictures Set comes with 20 12x16 single mats ONLY. Color: Black Mat Inside (opening) Size: 7.5x11.5 (bevel cut) for framing 8x12 photos in a 12x16 picture frame. Mat is White core and 4-ply thick (about 1.4 mm or 1/16 inch). THIS ITEM DOES NOT INCLUDE BACKING BOARDS OR CLEAR BAGS. Please Unwrap the plastic wrap & Flip the first mat over to see the actual color mat.