Waterproof: It is waterproof, which effectively prevents water from seeping inside and provides full protection for the loose-leaf pages inside. Transparent Design: The transparent binder has high clarity, perfectly displaying your notebook. You can clearly see the cover of the book, and it has a smooth surface that reflects light, making it shiny and beautiful. Size: Waterproof PP Loose Leaf Book Covers is about 195mm long, 115mm wide, 27.5mm thick, 1pc, loose-leaf page is about 190mm long, 88mm wide, 0.4mm thick, the hole is about 6mm, 10pcs. Plastic Material: It can effectively prevent the loose-leaf pages from being scratched. This case is very lightweight, easy to install, and fits your loose-leaf pages perfectly, making it more secure. Usage: Effectively protect your notebooks for school, office, travel journals, creative writing, work records, budget planners, sketches & drawings, study notes, diaries, etc.