What is the maximum weight limit for domestic shipments?

The United States Postal Service has specific weight limits for domestic shipments that vary based on the shipping service selected. For most services, such as Priority Mail and Priority Mail Express, the maximum weight limit is 70 pounds. However, for packages sent via services like First-Class Mail, the limits generally cap at 15.99 ounces for a single piece. It is important to note that certain services may have additional restrictions or requirements. If customers need to send heavier packages, they can consider using the Retail Ground service, but the maximum weight limit remains the same at 70 pounds. It is advisable for customers to check the current information available on the USPS website for the most accurate details and any updates regarding weight limits, as these can change based on service conditions.