The United States Postal Service (USPS) mailing service rates increased by about 7.8% on July 14, 2024:

First-Class Mail Forever stamp: Increased from 68¢ to 73¢
First-Class Mail Letters (metered 1 oz): Increased from $0.64 to $0.69
First-Class Mail Postcards: Increased from $0.53 to $0.56
First-Class Mail Flats (1 oz): Increased from $1.39 to $1.50
Each additional oz. (letters and flats): Increased from $0.24 to $0.27