Golden State Art, Pack of 10 11x14 Double Picture Mats with White Core Bevel Cut for 8x10 Pictures + Backing + Bags, Black Over Black Set comes with 10 11x14 double mats, 10 backing boards and 10 clear bags 11x14 Double mat Picture Mats with White Core Bevel Cut for 8x10 Pictures Inside (opening) Size: 7.5x9.5 (bevel cut), Color is black over black Double Mat is White core and 4-ply thick over 4-ply thick (Each 4-ply is about 1.4 mm or 1/16 inch) The re-sealable adhesive strip of the clear bag is below the opening of the bag instead of on the flap.