Effective August 28, 2016, the PRC (Postal Regulatory Commission) has approved an increase in prices. Don’t worry – this increase only applies to First-Class Mail® parcels weighing between 1-3 ounces.
First-Class Mail® and Every Door Direct Mail® (EDDM®)
First-Class Mail®
You can find all this and more information on the USPS Postal Explorer website – Link