Index cards can help you stay organized and are great in a pinch. View larger Mead index cards are perfect for flash cards and school presentations. View larger mead 3 x 5-inch index cards, ruled, 100 count, white (63350) perfect for both students and professionals these 3" x 5" index cards can help you learn, remember and communicate. Ten, ruled lines on each index card help guide your writing so the notes you create are perfectly aligned, no matter how much or how little you write on each card. The spaces between each line are also large enough so that you can write at normal size and easily read your notes with a quick glance. Index cards are extremely versatile and can be used for virtually any need in class, at the office or on the go. Smaller and more convenient than a notebook, ruled index cards always come in handy. Keep a stack in your backpack, purse, briefcase, or even in your pocket. 100 cards per pack, white. 10 uses for mead index cards: 1.