Multicolored Labels: With a total of 10 styles and 200 pieces, perfect for color-coding your books, there are a variety of numbers and colors you can use in your life. Reusable: Features a clear and writable design that does not obscure the information you mark and is easy to label; half of the adhesive strip labels are sticky and can be easily removed and repositioned. Versatile Tab: Adhesive strips with a 14cm ruler, the ruler is soft and not easy to break. The ruler can be clipped into the notebook, and you can use it for measuring activities as needed. Safe Material: The colorful sticky notes are made of high-quality PET material, non-toxic and odorless, and can be used anytime and anywhere.