GPI – Packing List Envelopes, 5.5″ x 10″ Packing Slip Pouches, Clear Plastic Envelope Sleeves with Self-Adhesive Strip, Top Loading for Shipping Labels, Packing Lists, Invoices & Paperwork. 1000 Pack 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 polymer that keeps them attached to packaging through the entire shipping process. MATERIAL: Waterproof & dustproof LDPE with transparent outer face pouch USES: Great for packing lists, shipping labels, invoices & paperwork. Stick to boxes, packages envelopes mailbags etc. POUCH SIZE: Width: 5.5″ X Height: 10″ Thickness: 2 Mil (0.002 inch)