Question
What is the minimum size Postcard the USPS will accept for mailings?
Answer
The smallest postcard the USPS will accept for mailing is 3.5 inches by 5 inches.
- Anything smaller than 3.5" x 5" is nonmailable and will be returned
- Cards should be rectangular to avoid extra handling fees
- Larger cards may fall into different postage rate categories
- Check current USPS mailing standards for the latest requirements
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