Package Includes: : You will receive 3 sets of flash cards in different colors. 1 set blue revision card, 1 set pink revision card and 1 set yellow revision card, 50 sheets for each color, enough quantity for your various needs. . Material and Size: : The revision cards are made of premium paper, sturdy and durable, smooth and perfect for writing. The size of index card is about 12. 5 x 7. 6 cm/ 5 x 3 inches. . Considerate Design: : The record cards have dotted lines for easy tearing and use, and you can tear off a sheet of index cards as a sticky note in seconds. Index cards have metal binding rings for easy page turning. . Clear Frosted Cover: : The index cards come with a clear frosted plastic cover that flips over as a backing for easy writing.