Kick your study routine up a notch with the help of classic canary index cards from School Smart. Unruled index cards made from 90 lb. index stock are ideal for creating flashcards that aid memorization and speech preparation. Cards measure 4 x 6 inches, making them perfect size for storing in your backpack, a pocket, or even a folder in your binder. Sold as a pack of 100 index cards. Download School Smart Ruled Paper Guide