What Are Forever Stamps and How Do They Work?

2026-02-07

What Are Forever Stamps?

Forever Stamps are postage stamps commonly used for many standard First-Class Mail letters within the United States. They are popular because they are easy to keep on hand for personal letters, greeting cards, invitations, office correspondence, and seasonal mail.

How Do Forever Stamps Work?

For many standard 1-ounce domestic letters, one Forever Stamp is commonly used. However, postage needs can change based on weight, size, shape, thickness, rigidity, and destination.

  • Standard letters may use one Forever Stamp.
  • Heavier or oversized letters may need additional postage.
  • Square or rigid envelopes may need extra postage.
  • International mail uses different postage requirements.

Choosing a Design

Flag stamps are classic for everyday mail. Love stamps are popular for weddings and personal cards. Holiday stamps work well for seasonal greetings.

Related Resources

For more help, visit the Forever Stamps Guide, read the Forever Stamps FAQ, or review our Authenticity Guarantee.

Browse Forever Stamps, U.S. Flag Stamps, Love Stamps, and All Stamps.