Golden State Art, Pack of 10 11x14 Double Picture Mats with White Core Bevel Cut for 8x10 Pictures + Backing + Bags, Mix Color Pack of 10 11x14 Double mat Picture Mats with White Core Bevel Cut for 8x10 Pictures This item comes with 10 11x14 double mats, 10 backing boards and 10 clear bags Inside (opening) Size: 7.5x9.5 (bevel cut), Mix Color White core and 4-ply thick over 4-ply thick (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.