Cumberland Plain Envelope Pocket B4 250 x 353mm Strip Seal White Box Of 250The Cumberland B4 Plain Pocket Envelopes offer premium quality and durability, ideal for mailing larger documents without folding. Made from 100gsm white paper, these envelopes feature a strip seal closure for quick, secure sealing and a pocket style short side opening for easy document handling. Sized at 250 x 353mm (B4), they comfortably fit A4 documents, folders, or thicker contents. Key Features: B4 size (250 x 353mm) fits unfolded A4 documents