What is the maximum thickness allowed for a flat according to USPS standards?

The maximum thickness allowed for a flat according to USPS standards is 3/4 inches. This measurement is key for properly categorizing mail and ensuring that it complies with postal regulations. Flats refer to larger pieces of mail that are not classified as letters or parcels, and they typically include items like catalogs, magazines, and other similar materials.

Adhering to the 3/4 inch thickness limit helps streamline the processing and delivery of mail, as these dimensions are designed to fit within the sorting and handling systems used by the USPS. Each category of mail has specific requirements to ensure efficient movement through the postal system while also maintaining the integrity and safety of the items being mailed. It is important for postal employees and those preparing mail to understand these specifications to avoid delays or potential issues with mailing.