How much does it cost to mail a 5 ounce manila envelope?

As of my last knowledge update in October 2023, mailing a 5-ounce manila envelope within the United States typically costs around $1.50 to $3.50, depending on the service used, such as First-Class Mail or Priority Mail. Prices can vary based on factors like the envelope's dimensions and any additional services like tracking or insurance. For the most accurate and up-to-date pricing, it's best to check with the United States Postal Service or your local postal provider.