What is the maximum thickness for a postcard?

The maximum thickness for a postcard is .016 inches. This measurement is crucial for ensuring that the postcard meets the United States Postal Service (USPS) standards for mailing. Postcards must adhere to specific dimensions to qualify for the lower postage rates associated with postcard mailing.

In this case, .016 inches is the threshold that defines the line between a standard postcard and items that may require different rates or classifications. If a postcard exceeds this thickness, it would not be classified as a postcard by USPS and would need to be processed differently, often resulting in higher postage costs. Understanding these standards helps in efficiently planning mailings and ensuring compliance with USPS regulations.

Knowing the exact measurement is essential for anyone involved in postal operations, as it helps avoid potential mailing issues and additional charges due to improper sizing.