Pack of 200 5x7 WHITE Picture Mats Mattes with WHITE Core Bevel Cut for 4x6 Photo Set of 200 pieces of 5x7 Picture Mats for 4x6 Photo This item comes with the 200 pre-cut mats only, Backing board is not included. The opening size is 3.5"x5.5" for 4x6 print. Color: WHITE with WHITE CORE The mats are beveled cut with white core and 4-ply thick (about 1.4 mm or 1/16 inch), The backing is white on both side. THIS ITEM DOESN'T INCLUDE BACKING BOARD.