Golden State Art, Pack of 20 8x10 White Picture Mats for 5x7 Pictures +1/8 White Foam Backing+Bags Set of 20 pieces of 8x10 Picture Mats for 5x7 Photo with backing boards and bags This item comes with the 20 pre-cut mats, 20 backing boards and 20 clear bags. The opening size is 4.5 x 6.5 for 5x7 print. Color: White 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.