Mat Board Center Brand Premium Crescent 8x10 White Picture Mat Matte Sets. Includes 50 White Core Bevel Cut Mattes for 5x7 Photos, 50 White Backers & 50 Clear Bags. Color BW222 Set of 50 pieces of 8x10 Picture Mattes for 5x7 Photos with 50 backing boards and 50 crystal clear sleeve folding flap bags. Mat Board Center Brand Premium High Quality Mattes, Backers & Plastic Sleeve's that are all Made in the USA by Crescent. The opening size is 4.5"x6.5" for 5x7 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.