10 pcs of new 8 x 10 Quality Picture Mats. The Openings are Bevel cut 4.5 x 6.5 to fit a 5 x 7 photo or print. These mats are cut from Quality white core mat board and are excellent for framing photos or prints. Also great for crafts, backboards, signs, children's projects, and school projects. Thickness: 4-ply: 1.4mil or 1/16 inch These are Acid Free matboards.