What is one of the PME labels used for Priority Mail Express?

The PME label used for Priority Mail Express is labeled as 11-B. This designation is specific to the Priority Mail Express service, which is the USPS's expedited shipping option that guarantees overnight delivery to most U.S. addresses. The 11-B label is designed to ensure that parcels are processed correctly and handled with priority, reflecting their expedited nature.

Understanding the correct label is crucial because using the wrong label can lead to shipping delays, tracking issues, or miscommunication about the service level expected by the customer. Each label in the USPS system is designated for specific services, which helps streamline operations and maintain the expected delivery standards for different types of mail.