For a standard envelope weighing under 1 ounce, one USPS Forever Stamp is typically sufficient for domestic mail in the U.S..
If your letter is heavier than 1 ounce, rigid, or lumpy (containing items like coins), it may require a non-machinable surcharge or additional stamps.
Correct addressing is the most crucial step to avoid delivery delays.
Use Global Forever Stamps for international destinations, as standard domestic stamps will not be enough. 4. Send Your Letter Once sealed and stamped, you can send your letter by: Dropping it into a blue USPS collection box.
For a standard envelope weighing under 1 ounce, one USPS Forever Stamp is typically sufficient for domestic mail in the U.S..
If your letter is heavier than 1 ounce, rigid, or lumpy (containing items like coins), it may require a non-machinable surcharge or additional stamps.
Correct addressing is the most crucial step to avoid delivery delays.
Use Global Forever Stamps for international destinations, as standard domestic stamps will not be enough. 4. Send Your Letter Once sealed and stamped, you can send your letter by: Dropping it into a blue USPS collection box.