Check the listing for details. Bubble Mailers Padded Envelopes Mailing Yellow Mailer Packages 20x25mm, 25pcs. Condition: New. Listed at 20.17 USD. What is this?Our bubble padded mailers are made from polyethylene and paper, moisture resistant, tear strength. They are very suitable for the distribution and logistics of documents, cosmetics, jewelry, small items and other small accessories, providing good anti-extrusion protection.What will I get?Package Content: 25 Pack Padded Bubble Envelopes; Width x Inner Height:20x25cm/7.87"x9.84"; Thickness: 5mm/0.2 inch; Extended Seal Length: 4cm/0.16 inchAre there any advantages of the product?The bubble envelope is lightweight and does not increase transportation costs. The yellow envelope is completely opaque, great privacy protection. The interior is of a bubble-lined wall structure, which provides additional protection during transportation to ensure that the package is intact.