Desktop Publishing Supplies Brand 65lb White 4up 3x5 Index Card Sheets make it simple & affordable to create custom index cards from your home or office printer. These high quality flash card sheets are microperforated with 72 perforations per inch for easy breaking apart and cleaner edges. Our Blank white flash cards are created to work with the industry standard 4up 3x5 index card layout- making them work with virtually all design software! Each card measures 3" x 5". These cards are made from a 65lb Cover (176 gsm) Bright White Cardstock that is both inkjet and laser printer compatible.