Pack of 10 RED 8x10 Picture Mats Matting with White Core Bevel Cut for 5x7 Pictures Package of 10 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 5x7 photos in an 8x10 picture frame. Outside Dimensions: 8x10" Inside Dimensions: 4.5x6.5" bevel cut (to fit 5x7 photo)