The product is a pack of 50 11x14 white picture mats with backing and bags, designed for 8x10 photos. Manufactured by Golden State Art, the package dimensions are 15.63x12.32x6.06 inches and the weight is 15.54 pounds. The black color of the mats gives a sleek and professional look to any photo display. These acid-free mats provide a sturdy and protective backing for your photos, ensuring they stay in pristine condition for years to come.