Nadia Petrov Customer Education Lead at 4OVER4.COM
Nadia is our customer education voice, built from the knowledge of our production team, with over 20 years in printing.
Question
How thick can my printed piece be and still mail as a letter?
Answer
To qualify for USPS letter postage, your printed piece has to stay inside specific thickness and weight limits. Most standard card and paper stocks fall comfortably within them.
| Attribute | Letter-rate maximum |
|---|---|
| Thickness | 0.25 inches |
| Weight | 3.5 ounces |
- Common stocks like 14pt and 16pt sit well under the thickness cap.
- Go past 0.25 inches or 3.5 ounces and the piece bumps into flat or parcel rates, which cost more.
- Match your stock weight to the postal category before ordering so postage does not surprise you at the counter.
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