USPS Priority Mail is the USPS’s class of mail that is their top priority to ship out. Fourth Class Mail: Media Mail (CDs, vinyl records, DVDs, books, bound print media consisting of 8 or more pages.).Third Class Mail: Marketing mail, flyers, mailers, etc.Second Class Mail: periodicals, magazines, newspapers that are printed more than 4 times a year.First Class Mail gets its name because is considered the top tier of mailed letters in comparison to: First Class Mail is a class of mail used to ship letters, thick envelopes, padded envelopes, and lightweight packages. In the world of USPS, that would Priority Mail Express. Why is it Called First Class Mail?įirst Class Mail doesn’t mean the same as a first class flight. Letters are a little faster since they sort more quickly. Delivery usually takes 2–5 business days for parcels to reach their final destination. The maximum allowable size for parcels are dimensions of 22″ x 18″ x 15″. USPS First Class Mail is an economical way to ship parcels, thick envelopes, and envelopes weighing under 16 oz. We’ll go over a few situations where one service may win over the others. There are instances when one of these services will win over the other.

For instance, the USPS has recently slowed First Class Mail. However, there are instances when the choice is not so black and white. If a parcel weighs less than 16 ounces, it makes the most sense to use First Class Mail. Generally, the deciding factor in making a decision in First Class vs Priority Mail comes down to weight. The two most common USPS services a merchant uses to ship with are First Class and Priority Mail.

Airmail priority