Golden State Art, Pack of 20 11x14 White Picture Mats with White Core Bevel Cut for 8x10 Pictures Pack of 20 11x14 White Picture Mats with White Core Bevel Cut for 8x10 Pictures This item comes with 20 11x14 single mats Inside (opening) Size: 7.5x9.5 (bevel cut), Color is White White core and 4-ply thick (about 1.4 mm or 1/16 inch). Perfect for framing 8x10 photos in an 11x14 picture frame. THIS ITEM DOESN'T INCLUDE BACKING BOARD.