Check the listing for details. GREY MAILING BAGS STRONG POLY POSTAL POST POSTAGE SELF SEAL PACKAGING STRONG. Condition: New. Listed at 2.58 USD. MAILING BAGS STRONG POLY POSTAL POST POSTAGE SELF-SEAL PACKAGING STRONG GREY | PINK | WHITE | CLEAR | PURPLE Mailing Bags Strong Poly Postal Post Postage Self Seal Packaging. Our bags are tear-proof, waterproof, anti-cracking, and moisture-resistant. Strong Self-Seal adhesive ensures that once the package is sealed, it can not be opened from the opening unless being broken. The internal Black interior makes them 100% Opaque such that the content inside can not be visible from outside. These bags can be used for different items from Small to Extra Large such as books, comics, cards, clothing, shoe box, etc. Strong & Durable Coloured Mailing Bags are available in the following sizes. 4.7" x 6.7" - Extra Small 6.5" x 9" - Small 10" x 14" - Medium 12" x 16" - Large 14 x 21" - Extra Large 17" x 22" - XX Large 17" x 24" - XX Large 22" x 30" - XXX Large Good Quality, Strong, 60 Micron Thickness, Waterproof and Light Weight Poly-mailers GREY | PINK | WHITE | CLEAR | PURPLE