Applicable size - Our transparent book covers are designed for A4 notebooks and books (297 mm x 210 mm). ADJUSTABLE DESIGN - An integrated design that can cover thick books is used, and the width of one side of the book cover can be adjusted at will, which is convenient to adapt to the thickness of different books. Waterproof Material - Made of waterproof PP, it can effectively protect the book from moisture. High flexibility, no deformation after rolling. Thickened Transparent Book Covers - Thickened PP, durable and reusable, wear-resistant, longer service life. Perfect Protection - An effective little helper that helps you protect notebooks, folders, school cases and books from dust, dirt, moisture, bending, tearing and dog ears. Product Information Size: A4 Features: - Made of environmentally friendly PP material, durable and long lasting. - Adjustable single-page design according to the thickness of different books. - Can effectively protect the book from moisture. - Protect children's books from dirt, moisture and bending. - A set of 10 pieces, worth having. Specification: Material: PP Product size: 420 x 295 mm (adjustable width) Product color: Transparent Package included: 10 x transparent book covers