Features: 【Friendly To Environment Assurance】Crafted from PP component, it is safe and not toxic, ensuring students' health during use. 【Transparent Design for Convenience】The transparent exterior allows book covers to be clearly visible at a glance, enabling quick identification of textbooks without rummaging. 【Enhanced Waterproof Protection】Features excellent waterproof performances, effectively preventing liquid penetration safeguards books from damage. 【Flexible Size Compatibility】Available in multiple specifications to accommodate textbooks and notebooks of varying dimensions, meeting diverse covering requirements for educational component. 【Abrasion and Tear Resistance】Enhanced durability against wear and tear extends the cover's life minimising the need for frequent replacements. Specifications: Compoennt: PP Friendly To Environment , good wear resistance and tear resistance Size: 16k: 26.5x38.5cm/10.43x15.16in Large size : 30x43cm/11.8x16.93in, Small size 32K: 21.5x31cm/8.46x12.2in Attributes: Transparent design, easy to view book titles and covers, easy to manage and search. Practicality: Protect textbooks from scratches and corners, extend the life of the books, and is suitable for daily study and portability. Package Includes: 10pcs Book Covers (size suitable for textbooks for primary and secondary school students) note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.