Rotary business card file easily organizes and protects business cards or 2 1 4" x 4" cards (sold separately). Simply slide business cards into transparent sleeves to keep cards clean and in one space. Clear Card Sleeves Transparent, Durable Protectors for Standard Size Amazon.com : 3x5 Index Card Sleeves Binder Sheets 50 Pack Clear Plastic Refill 2 Pocket Page Protector for Recipe Cards, Photo Cards, Flash Cards Fits 6 Ring A5 Binder StoreSMART: Non Adhesive Pocket: 3" x 5 3 8" 3 x 5 Index Card Holder Open Short Side 3" x 5" Clear Adhesive Pocket Sleeves Staples Index Card Holder for 3" x 5" Cards, 100 Card Capacity, Assorted (ST50992 CC)