What is the minimum height of a postcard?

The minimum height of a postcard is established at 3 1/2 inches. This specification is important for ensuring that postcards can be processed efficiently through the postal system. The Postal Service defines this minimum height to help standardize mail pieces, which optimizes sorting and delivery. Postcards that meet this height requirement can be properly categorized as postcards, allowing them to receive the appropriate postal rates.

This standard is also designed to ensure clear visibility of the address and any pertinent information, facilitating easier handling both during mailing and by the recipient. Thus, adherence to the minimum height of 3 1/2 inches is crucial for anyone preparing postcards for mailing, ensuring compliance with USPS regulations.