How much does it cost to mail a 5 x 7 envelope?

As of October 2023, the cost to mail a 5 x 7 envelope within the United States typically falls under the standard letter rate if it meets the weight and thickness requirements. The price for a First-Class Mail letter (up to 1 ounce) is approximately $0.66. If the envelope exceeds the weight limit or is considered non-machinable, additional fees may apply. Always check with the USPS or your local postal service for the most accurate and current rates.