These bags accomodate Silver, Regular and some later Golden Age comic books in the 7 1/4'' W x 10 1/2'' L size range. Many comic books printed from the 1960 through the 1980's work with this bag. 2 mil ultra clear polypropylene Accommodates comic books between 7 1/4'' W x 10 1/2'' L range Polypropylene is an inert, archival quality, PVC-Free material Ideal protection against dust and moisture during handling and storage 100 bgs per pack