1.Large capacity: The index card box is made of acrylic, which can maintain index card box shape and clarity for a long time. The bottom is equipped with a non-slip pad, which is stable and durable. The inner size of the card organizer is 9.7x5.3x3.7inch, with four card slots, the total capacity of the index card organizer is up to 600 index cards, notes, recipe cards, etc., transparent storage, clear at a glance, keep your items neatly organized and easy to find. 2. Color index cards: The index card box set contains 150 double-sided horizontal index cards in 3 colors (red, blue, and yellow), with a size of 5 3 inch, which can be easily classified, organized and displayed according to various uses and attributes. Flash card holder is convenient for you to classify records, mark key points, record more efficiently, and improve learning and work efficiency.