25 BCW Graded Mylar Comic Book Bags - Lasts Indefinitely 1 Pack of 25 Graded Comic Book 2 Mil Mylar 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