These are designed to fit inside 9-pocket pages, screw-downs, magnetics, snaps, toploaders, and storage boxes. The BCW Bowman '48Card Insert Sleeve is an acid-free, archival quality product that is designed for the safe long-term protection of your valuable collectible trading cards. This product features high-clarity polypropylene and an inner storage pocket with strong welds. BCW Bowman '48 Card Insert Sleeves fit standard 9-pocket pages and storage boxes.