US Art Supply Art Mats Brand Premier Acid-Free Pre-Cut 11x14 Black Picture Mat Matte Face Frames. Includes a Pack of 25 White Core Bevel Cut Matte Frames for 8x10 Photos Set of 25 pieces of 11x14 Black Picture Matte Face Frames for 8x10 Photos Art Mats&trade; Brand Premium High Quality Acid-Free Matte Frames The opening size is 7.5"x9.5" for 8x10 photo prints. Color: Black The mats are beveled cut with white core and 4-ply thick (about 1.4 mm or 1/16 inch) The set is professionally Packed and Boxed to Assure that All Precautions have been made for a Save Arrival of your purchase.