Pack of 20 Off-White/Metallic Gold 11x14 Double Mats Mattes with White Core Bevel Cut for 8x10 Photo + Backing + Bags Pack of 20 11x14 Off-White/Metallic Gold Double Mats Mattes with White Core Bevel Cut for 8x10 Photo + Backing + Bags This item comes with 20 mat board The opening size is 7.5"x9.5" for 8x10 print The mats are beveled cut with white core and 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