Can you mail manila envelope with one stamp

In the United States, the answer is yes, you can mail a Manila envelope with one Forever Stamp, but there are some conditions:

  1. Weight and size: The envelope must weigh 1 ounce or less and be no larger than 6.125 inches long, 11.5 inches high, or 0.25 inches thick. If your envelope exceeds these dimensions or weighs more than 1 ounce, you'll need additional postage.
  2. Destination: The envelope can be sent to any destination within the United States, including Puerto Rico, Guam, and the U.S. Virgin Islands. However, if you're sending it to a foreign country, you'll need to use a Global Forever Stamp or additional postage.
  3. Content: The envelope can contain only a single piece of mail, such as a letter or a small package. If you're sending multiple items or a large package, you'll need to use additional postage.

Here are some examples of what you can mail with one Forever Stamp:

However, if you're sending a larger or heavier package, you'll need to use additional postage. You can use the USPS Postage Calculator to determine the correct postage for your mailpiece.

Remember to affix the Forever Stamp to the upper right corner of the envelope and make sure it's properly addressed and prepared for mailing.