What does aspect ratio refer to in mailing terms?

Aspect ratio in mailing terms specifically refers to the ratio of the length to the height of an envelope or mail piece. This measure is crucial because it helps in determining how the piece will be processed by postal services, as well as its eligibility for certain mailing categories and rates. A proper aspect ratio ensures that mail pieces meet the requirements for functionality and efficiency in automated sorting systems.

In this context, the aspect ratio provides insight into the proportions of a mailing item, which can impact its handling and delivery. For instance, if a mail piece does not conform to specified aspect ratio guidelines, it may be subject to additional postage or may not be processed in an automated manner. This understanding helps businesses design their mailings effectively to ensure they are cost-efficient and meet postal standards.