What is the maximum weight for mailing a first-class item?

The maximum weight for mailing a first-class item is indeed 13 ounces. This limit is set by the United States Postal Service (USPS) and is crucial for differentiating between first-class mail and other types of mailing services. Items weighing 13 ounces or less can be sent as first-class mail, which typically allows for faster delivery times and is often used for personal correspondence, bills, and lightweight packages. When items exceed this weight, they need to be sent using other mailing options, such as Priority Mail, which offers different weight limits and pricing structures. Understanding these weight classifications is essential for effective mail handling and logistics management.