Golden State Art, Pack of 10 Mixed Colors 16x20 Picture Mats Matting with White Core Bevel Cut for 11x14 Pictures Pack of 10 16x20 Mix color Picture Mats with White Core Bevel Cut for 11x14 Pictures This item comes with 10 16x20 single mats. Inside (opening) Size: 10.5x13.5 (bevel cut), Color is assorted. White core and 4-ply thick (about 1.4 mm or 1/16 inch). Perfect for framing 11x14 photos in an 16x20 picture frame. THIS ITEM DOES NOT INCLUDE BACKING BOARDS OR CLEAR BAGS.