The United States Postal Service will increase postage rates starting January 22. Most noticeably the 1-ounce first-class letter rate will increase 2 cents to 49 cents. The international letter, additional ounce, and postcard rates will remain the same. For other rate increase details visit the USPS website.
The flat rate envelope for Priority Mail and Priority Mail Express will increase to $6.65 and $23.75, respectively. Two new stamps for that rate will be issued in panes of four. Both of those stamps, will be issued Sunday, January 22 in Kansas City, Missouri. No ceremony is planned for either of the actual locations in Hilo, Hawaii or St. Louis, Missouri.
Here are the USPS details on the $6.65 Lili’uokalani Gardens Priority Mail stamp and the $23.75 Gateway Arch Priority Mail Express stamp: