Based on this product's specifications, here are some alternatives and similar models
Envelope C5 Sigel DU230 Transparent 25 pcs
Summary description:
The Sigel DU230 envelope is a transparent C5 envelope (162 x 229 mm) ideal for professional use. It is made from high-quality materials, ensuring durability and a weight of 100 g. Each pack contains 25 envelopes, perfect for organizing documents or sending letters securely. The transparent design allows for easy visibility of contents, making it convenient for both personal and business use.