Golden State Art, Pack of 25 White Pre-cut 11x14 Picture Mat for 8.5x11 Photo with White Core Matte Sets. Includes 25 High Premier Acid Free Bevel Cut Mattes & 25 Backing Backers Board & 25 Clear Bags 25 11x14 White Mats Matting for 8.5x11 + backing + bags This item comes with 25 11x14 single mats, 25 backing, and 25 bags These are Acid Free matboards, Standard 4 ply: 1.4 mil or 1/16 inch Outside Dimensions: 11x14", Inside Dimensions: 8x10.5" bevel cut (to fit 8.5x11 certificates ) Perfect for framing 8.5x11 documents in an 11x14 frame.