Pack of 20 BLACK 11x14 Picture Mats Matting with White Core Bevel Cut for 8x10 Pictures Package of 20 pre-cut mats with white core bevel cut These are Acid Free matboards, Standard 4 ply: 1.4 mil or 1/16 inch Perfect for framing 8x10 photos in an 11x14 picture frame. Outside Dimensions: 11x14" Inside Dimensions: 7.5x9.5" bevel cut (to fit 8x10 photo)