Based on this product's specifications, here are some alternatives and similar models
Cardboard Document Folder Barbara A4 with Elastic Strap, 280 g/m², White
Summary description:
Barbara A4 cardboard document folder made from 280 g/m² paperboard, designed to store and transport A4 documents. Features a closing elastic strap to secure contents and a white finish suitable for office, school, or home use. Practical for organizing papers, reports, invoices, and project documentation while protecting against bending.