1. The binder size is 310*220mm. It is slightly larger than A4 paper, so it is not easy to get stuck when inserting the paper, better paper protection. Flap cover design is easy to use. . 2.The folder is made of high quality kraft paper, which is durable, strong, tear-resistant and moisture-proof, and can be used repeatedly. Lightweight materials provide everyday protection and comfortable wearability. . 3.Suitable in the office, it allows you to store and classify important documents (contract, invoice, files, employee archives, business plan and project, bill of exchange, etc).Indispensable for school and teachers, exam paper, student file, speech material, dissertation, ect. . 4.These folders are ideal for everyday office workers and students who need to organize and classify lessons, which can help you find the information you need more easily. you need. . 5.Tip: Make sure your order is from Ibluelover, as we have never authorized any other sellers. An IBLUELOVER exclusive. If you have any questions, please don't hesitate to contact us, our customer satisfaction is our top priority. .