Product Information: Five Hundred Biodegradable, Environmentally Responsible Document Wallets. Internal Dimensions 318mm x 235mm (width x height) suitable for A4 Document Size. Strong Adhesive Backing. Packaging Shack’s range of Environmentally Resposible Documents Enclosed Wallets are designed to attach invoices, dispatch notices etc. onto packages and cartons. Manufactured from strong biodegradable materials 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.