BCW Art Print Mylar Bags - 2 mil - 11 1/2 X 17 1/2 (10 /Pack) BCW Art Print Mylar Bags - 2 mil - 11 1/2 X 17 1/2 (10 Bag(s) per Pack) Holds lithographs and other items 11 X 17 - Crystal Clear Made of 2 mil polyester (Mylar) - Strength is 10 times that of polyethylene 1 1/2 inch flap for closure - - Protects for 100's of years Dimensions: Exterior 11 1/2 x 17 3/8 x 1 1/2 Flap