Golden State Art, Pack of 20 11x14 Double Picture Mats with White Core Bevel Cut for 8x10 Pictures Pack of 20 11x14 Double Picture Mats with White Core Bevel Cut for 8x10 Pictures This item comes with 20 11x14 single mats Inside (opening) Size: 7.5x9.5 (bevel cut), Color is assorted White core and 4-ply thick over 4-ply thick (about 1.4 mm or 1/16 inch)