PACKAGING INCLUDES: 5 colors of 3x5inch (12.5x7.5cm) flash cards, each color contains 100 cards, a total of 500 cards, sufficient number to meet your daily study and work needs. HIGH QUALITY: Revision cards are made of high-quality paper, smooth and thick, suitable for a variety of pens, no ink leakage problems, environmental protection, wrinkle-resistant. EYE PROTECTION: Review sticky notes in soft colors to make your eyes more comfortable while studying. DOUBLE - SIDED PRINTING: Review paper with double-sided printing, you can use for both sides of the writing, more economical paper, at the same time, the thickened design does not have to worry about ink permeability, can be used with confidence. MULTIPLE APPLICATIONS: Our flashcards are perfect for systematic study of words, formulas and arithmetic for office work, jobs, business, university, college, school, education, tests, exams, review, notes, note-taking and more!