US Art Supply Art Mats Acid-Free Pre-Cut 11x14 White Picture Mat Matte Sets. Includes a Pack of 25 White Core Bevel Cut Mattes for 8x10 Photos, Pack of 25 Backers & 25 Clear Sleeve Bags Set of 25 pieces of 11x14 Picture Mattes for 8x10 Photos with 25 backing boards and 25 crystal clear sleeve folding flap bags. Art Mats&trade; Brand Premium High Quality Acid-Free Mattes, Backers & Plastic Sleeve's The opening size is 7.5"x9.5" for 8x10 photo prints. Color: White 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 sides. The set is professionally Packed and Boxed to Assure that All Precautions have been made for a Save Arrival of your purchase. The opening size is 7.5&#034;x9.5&#034; for 8x10 photo prints 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 sides Mat board is suitable for general purpose framing and is acid-free 25 <span class="a-text-bold">- 11x14</span> Picture Matte Frames for 8x10 Photos 25 - Backing boards 25- Crystal clear sleeve folding flap bags