Golden State Art, Acid Free, Pack of 50 11x14 White Picture Mats Mattes with White Core Bevel Cut for 8x10 Photo + Backing + Bags
Brand: Golden State Art
Color: White

Backing is also 4-ply thick with both side white. Matboard can be used for matting photos, art, and needlepoint. Also great for crafts, backboards, signs, children's projects, galleries, to sell, shows, art shows, and school projects.

50 White 11x14 mats for 8x10 with backing + bag
This item comes with 50 single mats, 50 backing, and 50 bags.
The opening size is 7.5"x9.5" for 8x10 print.
The mats are beveled cut with white core and 4-ply thick (about 1.4 mm or 1/16 inch).