A4 clear plastic envelopes with colored piping are typically made of durable, transparent polypropylene (PP) material. The colored piping is primarily an aesthetic feature that also adds durability to the edges. 

• Size: Designed to hold A4 and US letter-size documents, with common product dimensions around 33cm x 23cm (13 x 9.4 inches).
• Material: Made from high-quality, transparent polypropylene (PP) plastic, which is waterproof, tear-resistant, and easy to clean.
• Thickness: Material thickness is often around 0.2mm (or 20C).
• Closure: Features a secure zipper closure to keep contents safe from falling out. 
• Design: The envelope is clear or translucent, allowing contents to be visible for easy identification without opening. It also features colored piping on the edges for a professional finish and added durability.
• Capacity: Can often hold around 200 sheets of A4 paper or more, especially models with an expandable gusset.
• Piping: Features colored piping (brown, gray, army green) along the edges, which adds durability and a neat finish.

Note: Item color will be randomly selected