Express Bag Black Courier Express Bag Size: 700pxX1050px, 850pxX1150px,950pxX1300px,1125pxX1500px or customized. Description: These Black Courier Bag is elementary bag in Express Industry. A good quality bag could hide item, do not let know whatâ??s in bag, and good strength, not easy to broken. And with adhesive tape, the Courier Bag can not open, unless destroy it. The Express Bag made of virgin LDPE, so wonâ??t bring damage to human body, And their bag layer structure is 3 Co-extrusion, and thickness is 0.11mm/ 0.13mm or customized. The size available in 500px - 1750px.