Pack of 10 16x20 White/White Double Mats Mattes with White Core Bevel Cut for 11x14 Photo + Backing + Bags Set includes 10 16x20 Double Mats, 10 backing, and 10 Clear Bags. 16x20 Double mat Picture Mats with White Core Bevel Cut for 11x14 Pictures Mat Inside (opening) Size: 10.5x13.5 (for 11x14 Print). Color is White over White. 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.