USPS Publication 28

USPS Publication 28, titled "Understanding Postage and Mailing," provides practical guidance on mailing items efficiently and cost-effectively. It explains how to select the appropriate postage, prepare packages and letters correctly, and understand mailing options for different needs. The publication covers topics like weight, shape, and size requirements, as well as different mailing services available. Its goal is to help individuals and businesses ensure their mail reaches its destination reliably while avoiding unnecessary costs or delays. Overall, it serves as a clear resource for proper mailing practices within the USPS system.