PACKAGE INCLUDES:150 index cards, comes with kraft paper covers for easy organization, 3 metal binding rings, convenient for you to carry around SIZE AND COLOR:Revision flash cards are 5 x 3 inch / 12.7 x 7.6 cm, compact, portable and pocket - size. You can put it in your coat pocket or backpack, jeans pocket, purse, and tote, easily accessible when needed. Flash cards come blue PRACTICAL TOOLS:Our review cards are made of thick, durable, wrinkle - resistant, smooth paper, perfect for writing. Meanwhile, each pack of index cards is protected by two sheets of tough brown kraft paper, which is not easy to be damaged or wrinkled and can be used for a long time EASY TO CARRY:The flash memory cards are delicate and compact, easy to carry on the go and do not take up space. The index cards are designed with rounded corners to prevent scratching your fingers. The attached loose - leaf ring can string papers together for easy storage and organisation MULTI - PURPOSE USE:Index cards can be used for list notebooks, different notes, diaries, memos, sketches, sketches, diaries, etc. Practical and portable stationery, which is essential for daily work and study