Product Information: Manufactured from Printed Polythene, Internal Dimensions 158mm (width) x 120mm (height). A6 / C6 Document Size. Strong Adhesive Backing. Packaging Shack’s range of Documents Enclosed Labels are designed to attach invoices, dispatch notices etc. onto packages and cartons. Manufactured from strong Polythene and featuring a peel able backing with strong adhesive that ensures that any enclosed documents remain with the attached package through the postal system and are protected from dirt, dust and moisture.