Custom envelopes play a vital role in businesses and organizations, ensuring the protection of documents and messages while providing the necessary privacy. These envelopes are personalized with the company's name and logo, along with the sender and recipient's details, making it easy to identify the source of the message upon receipt. The envelope is securely sealed to protect its contents. Additionally, the envelopes come in a size of 29.7x21 cm, with printing on one side. They are not only used in business settings but also for invitations, congratulations, or thank-you notes, and are specifically designed to match the occasion and purpose.