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
What's the best postcard size for a direct mail marketing campaign?
Answer
Match the size to the goal rather than defaulting to the biggest option. For most campaigns, 4 by 6 inches gives the best balance of cost and impact because it earns the lowest postcard rate while still holding a clear message and call to action. Step up to a larger format when the offer needs more visual space.
| Size | Postage | Best for |
|---|---|---|
| 4 x 6 in | Postcard rate | High-volume, budget-first sends |
| 5.5 x 8.5 in | Letter rate | Coupons and detailed offers |
| 6 x 9 in | Letter rate | Property photos, event details, standout reach |
| 6 x 11 in | Letter rate | Maximum mailbox visibility and response |
- Pick 4 by 6 when postage efficiency matters most.
- Go larger when the extra visibility is likely to lift response. Oversized cards such as 6 by 9 and 6 by 11 consistently outperform standard 4 by 6 on response, and the lift usually more than covers the higher postage.
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