How much is first class postage on a 1.9 oz letter?

As of my last update, first-class postage for letters in the U.S. is typically based on weight and size. For a 1.9 oz letter, the cost is generally higher than the standard rate for a 1 oz letter, which is currently set at $0.66. The rate for a 1.9 oz letter is approximately $0.93. However, it's always best to check the United States Postal Service (USPS) website or local post office for the most current rates.