From the Manufacturer:
Unruled white index cards come with 100 sheets in total per pack. Each card is your blank canvas to incorporate into a variety of applications.Size: 3"x5"inch- 7.6cm x 12.7cm. Index cards are great at helping you stay organized whether it's at home, school or the office! They will always be convenient to have on hand. Made out of GSM Paper. Index cards are a great tool for studying and enhancing memorization! They're easy to write on using pens, markers, pencils. The precision-cut edges help ensure the cards are the exact sameSize. These unruled white index cards are blank on both sides which is great for flash cards for studying. Perfect for home, school and office use. Ideal for creating to-do lists, studying cards, personal statement, presentation cards, quick reminders, receipt cards, and much more!