50 BCW Graded Mylar Comic Book Bags - Lasts Indefinitely 2 Packages of 25 Graded Comic Book 2 Mil Mylar Bags per Package (50 Bags) Fits CGC Graded Comic Books 2 mil material thickness Mylar Strength is 10 times that of polyethylene Exterior Dimensions: 9 x 14 1/4 - 1 1/2 inch flap for closure