Mat Board Center Pack of 10 11x14 Black Picture Mats for 8x10 Pictures +1/8 White Foam Backing+Bags Set of 10 pieces of 11x14 Picture Mats for 8x10 Photo with backing boards and bags This item comes with the 10 pre-cut mats, 10 backing boards and 10 clear bags. The opening size is 7.5"x9.5" for 8x10 print. Color: Black The mats are beveled cut with white core and 4-ply thick (about 1.4 mm or 1/16 in The re-sealable adhesive strip of the clear bag is below the opening of the bag instead of on the flap.