That depends on where you are mailing it FROM.
That will depend which country you are in, the destination of the envelope, and by which method you are mailing it.
About six dollars
There are other factors to take into consideration when determining the cost of mailing, such as, dimensions of the envelope. The best place to check is the US Postal Service website to be sure to get the correct number of stamps for your envelope.
A one ounce letter will cost you $.49 to mail. The fee for mailing a letter just increased in January.
"No, the cost of mailing a letter doesn't depend on the shape of the envelope but how much weight is actually inside the envelope. It's based on the weight."
As of June 10, one ounce of first class mail is 44¢. Every additional ounce is 20¢. So, a six ounce envelope would cost $1.44 to mail, or four forever stamps.
what is the cost to mail an A9 Announcement envelope 6x9
$0.61
To mail a 5.5x8.5 envelope weighing 2.8 ounces within the United States, you would typically need to use a first-class stamp. As of my last update, the cost for a first-class letter (up to 1 ounce) is $0.63, and each additional ounce costs around $0.24. Therefore, mailing your 2.8-ounce envelope would likely require approximately $1.11 in postage. It's always a good idea to check the latest rates from the USPS for the most accurate information.
The cost to mail a manila envelope will depend on the size of the envelope and the weight of the envelope. The average cost to mail a manila envelope that is 8"X11" is about $2 if the contents weigh less than one pound.
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.