New! Cardboard Gold is pleased to introduce the finest quality trading card soft sleeves ("penny sleeve") ever produced! We are using the same OPP (oriented polypropylene) material that has made our Perfect Fit Sleeves an instant hit. OPP is the clearest, strongest, and highest quality polypropylene you can buy. It's much more expensive than regular polypropylene but it's worth the extra cost if you want the very best for your trading cards. Size is 2 5/8" x 3 5/8" for standard size trading cards. Our Super Premium Sleeves are 2 mil which is the industry standard. Fits in regular 3x4 Top-Loaders and Card Saver 1 trading card holders. Only our new SP sleeves are made from ultra clear, oriented polypropylene! Exclusively from Cardboard Gold - Recommended by PSA!