16x20 Pre-cut Acid-free light cream mat, fits 11x14, Package(20) 16x20 Pre-cut Acid-free light cream mat, fits 11x14, Package(20) This item comes with 20 single mats The opening size is 10.5"x13.5" for 11x14 print. The mats are beveled cut with white core and 4-ply thick (about 1.4 mm or 1/16 inch). THIS ITEM DOESN'T INCLUDE BACKING BOARD AND CLEAR BAG