What is the minimum height requirement for postcards according to postal standards?

The minimum height requirement for postcards, as specified by postal standards, is indeed 3½ inches. This dimension is part of a set of criteria that ensures postcards can be processed efficiently in the mail system. The specified minimum height allows postcards to be easily handled by machinery and personnel during sorting and delivery.

In the mailing industry, adhering to these standards is crucial for ensuring that items are classified correctly, thus facilitating smooth postal operations and reducing the likelihood of delays or issues in delivery. Postcards that do not meet this minimum height requirement may be categorized differently, possibly incurring higher postage rates or facing return to the sender if deemed unsuitable for mailing. Understanding these specifications helps businesses and individuals prepare their mail correctly, ensuring that their communications reach their intended destinations without complications.