Solid 4x6 index cards heavy weight with 220gsm thick cardstock for smooth writing, durability and no ink bleed-through Single sided printing 4x6 lined index cards, ruled side for easy note taking, blank side for free drawing needs Classic white index cards 4x6 inches idea for making study notecards, flashcards, recipe cards and more Each pack includes 4x6 index cards lined 100 count for studying convenient choice These 4 x 6 index cards 100ct lay measures 1.1" thickness and 0.8 lbs(12.8 oz) heavyweight, offering premium quality OLIVO 4x6 Index Cards Lined Ruled 220gsm Heavy Weight Paper, White, 100-Count Pack