PERFECT A4 C4 FIT: Designed for A4 documents, these 324 x 229 mm C4 manilla board backed envelopes keep contents flat without folding. Ideal for certificates, contracts, reports, brochures, photographs, artwork, magazines and important paperwork. LIGHTWEIGHT & EASY TO LABEL: Made from premium 120 GSM manilla paper, these lightweight mailing envelopes help reduce postage costs. The smooth surface is perfect for handwritten addresses, shipping labels and courier stickers for fast. RIGID BOARD BACKED PROTECTION: Built with a 1000-micron hard board backing, these Do Not Bend envelopes help protect documents from bends, creases and damage during transit. Ideal for certificates, photographs, artwork, reports. STRONG SELF-SEAL CLOSURE: Featuring a peel-and-seal adhesive strip, these envelopes create a secure, tamper-evident seal in seconds without tape or glue. Designed to keep documents protected during postage, courier delivery and everyday handling. IDEAL FOR HOME & BUSINESS: Perfect for offices, schools, solicitors, estate agents, photographers, online sellers and home users. Great for posting passports, certificates, legal documents, artwork, catalogues, invoices, presentations and brochures. ECO-CONSCIOUS & RECYCLABLE: Made from recyclable manilla paper and rigid board, these eco-conscious mailing envelopes offer a sustainable alternative to plastic packaging while providing reliable protection for documents during delivery.