Pocket Jotter Index Card Holder in Horween Leather Handmade to Order Leather Pocket Index Card Holder Etsy Rite in the Rain Index Card Wallet Kit, No. 991T KIT My homemade 8 ring notebook that can open up like a binder. It uses 3x5 index cards, and I hole punched every sheet myself. I bought a leather cover for it, and it fits 3 Ring Leather Binder Pad Folio Style #103 Custom Leather Binder by McKinley Leather