The Postal Service approved a price change effective January 27, 2019, which will affect all mail classes and special service.  The increase, approved by the Governors of the Postal Service, would raise Mailing Services product prices, which include letter size, flats and international mail, approximately 2.5 percent. The price increase for Mailing Services is based on the Consumer Price Index. Shipping Services price increases vary by product and are “primarily…