What is First-Class Mail? First Class Mail is the most common and affordable way to send envelopes and lightweight packages. Anything you send to customers, including bills, invoices, correspondences and merchandise can be sent via First-Class, as long as your letters weigh less than 3.5 ounces.

What is the difference between first class and standard mail?

First class mail is intended for personal or business correspondence whereas Standard Mail is used more for advertisements and mass communication. First Class mail is delivered faster by the USPS than Bulk or Standard mail. First Class mail is generally delivered in 1-3 days locally and 3-5 days nationally by the USPS.

How long does first class mail usually take?

First-class mail delivery time is usually between 1 and 3 days, regardless of where you are in the United States of America. While some think that this is obvious, many believe that it takes just 1 day.