What is the maximum thickness allowed for postcards?

The maximum thickness allowed for postcards is .016 inches. This specification is important because it defines the limits for mail items to ensure they can be processed efficiently through postal systems. Postcards must adhere to this thickness requirement to qualify for the applicable postal rates and handling methods designated for that category.

When a postcard exceeds this thickness, it may not qualify for the same postal rates and could be considered a different type of mail piece. This standard helps maintain consistency and efficiency in mail delivery, as thicker items can require different handling processes and may complicate sorting and delivery. Understanding these postal regulations is crucial for businesses and individuals who want to send postcards reliably and cost-effectively.