100 Count 6.5″ x 10″ Shipping Label Envelopes, Clear Packing List Pouches with Self-Adhesive Back, Top Loading for Shipping Labels Sleeves, for Packing Slips, Labels Invoices & Paperwork. GPI FEATURES: Tamper evident easy peel-off adhesive strip on back, stick securely to your package. No need for packing tape QUALITY: High quality & durable 2 mil thick with industrial grade polymer that keeps them attached to packaging through the entire shipping process. MATERIAL: Waterproof & dustproof LDPE with transparent outer face mail pouch USES: Great for packing lists, shipping labels, invoices & paperwork. Stick to boxes, packages envelopes mailbags etc. POUCH SIZE: Width: 6″ X Height: 10″ Thickness: 2 Mil (0.002 inch)