Set of 50 pieces of 8x10 Picture Mats for 5x7 Photo with backing boards and bags</br>This item comes with the 50 pre-cut mats?? 50 backing boards and 50 clear bags.</br>The opening size is 4.5"6.5" for 5x7 print. Color: WHITE</br>The mats are beveled cut with white core and 4-ply thick (about 1.4 mm or 1/16 inch)?? The backing is white on both side.</br>The re-sealable adhesive strip of the clear bag is below the opening of the bag instead of on the flap.</br></br>Product Description</br></br>Any question? Please call us at 650-226-8119. This item comes with 50 pre-cut mats?? 50 backing boards and 50 clear bags. The opening size is 4.5".5" for 5x7 print. The mats are beveled cut. The backing is also 4-ply. The re-sealable adhesive strip of the clear bag is below the opening of the bag instead of on the flap. Our acid-free whitecore matboards are a 4-ply papermat that provide the aesthetic and design benefits of a bright white bevel. It can be used for matting photos?? art?? and needlepoint. Also great for crafts?? backboards?? signs?? children's projects?? and school projects.</br><br/>http://www.amazon.com/gp/product/B00B4I46OSSte