Mailing standards refer to the guidelines and requirements set by postal services to ensure efficient and accurate delivery of mail. These standards cover various aspects, including the size, weight, and format of mail items, as well as proper addressing and labeling. Adhering to these standards helps prevent delays and ensures that mail reaches its intended destination. In the United States, the United States Postal Service (USPS) establishes specific mailing standards that must be followed. These include using correct postage, maintaining clear and legible addresses, and following packaging requirements. By following these guidelines, senders can improve the chances of their mail being delivered promptly and without issues.