On July 28, the Postal Regulatory Commission (PRC) approved the proposal to increase the maximum size limit for a Presorted or Automation First-Class Mail (FCM) postcard.  The new maximum size is 9 inches long by 6 inches high.  The piece will have a thickness of .009 to 0.016 and is eligible for the card size prices.  The change is effective August 29, 2021.…