Dimensional weight pricing applies to which class of mail?

Dimensional weight pricing applies to the Priority Mail class of mail. This pricing method is used to determine shipping costs based on both the weight and the size of the package. With dimensional weight, if a package is large in size but light in weight, the shipping cost may be based on its dimensions rather than its actual weight. This practice helps ensure that shipping costs are aligned with the space a package occupies on transportation vehicles rather than just its physical weight, making it particularly relevant for lightweight, bulky items that are shipped via Priority Mail.

The Priority Mail service is designed for time-sensitive deliveries that may involve longer distances and transportation capacities, where the volume is an essential factor in logistics. Other classes of mail, such as Standard, First Class, and Media Mail, do not typically utilize dimensional weight pricing, focusing instead on simpler weight-based pricing structures.