Premier C6 Size Envelopes – Pack of 100 | Peel & Seal | 80 GSM | Security Lined Experience a perfect blend of convenience, security, and professionalism with Premier Office Basics C6 Envelopes. Designed to meet the highest mailing standards, these envelopes are ideal for both home and office use. Whether you're sending invoices, letters, or confidential documents, these envelopes offer a secure and presentable way to deliver your message. Made from high-quality 80 GSM paper, these envelopes feature a Peel & Seal closure for hassle-free sealing and a security printed interior to protect the confidentiality of your contents. Their C6 dimensions (114mm x 162mm) are specifically crafted to fit A4 paper folded into quarters, making them suitable for a wide range of documents. These envelopes are Australia Post preferred, featuring printed post code boxes for easy processing and compliance with mailing standards.