Feature: Packing List Pouches Size: 4.5 “x 5.5”, Total 100-1000 PCS( as your choice). Perfect for mailing and shipping your return label or address label. Strong Self-adhesive: The packing list envelopes can be well attached to any object, such as cardboard boxes, wood, metal, etc., without fear of falling off. Excellent Protection: Shipping Label Envelopes not only protects the label/packing list from wear during transportation, but also is waterproof and dustproof, ensuring that your package reaches its destination safely. Easy to Use: Just peel off the backing to use. The loading packing list has a smooth surface and high transparency, the documents are clearly visible, facilitating address and barcode scanning. Note: the size is:4.5 “x 5.5″, do not fit the 4″x6” labels.