Postcards
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Postcards stand out in direct marketing for their ability to deliver eye-catching, concise content that engages recipients instantly, making them highly effective for promotional campaigns. For transactional or operational communications, their streamlined, envelope-free design ensures important information is immediately visible, enhancing clarity and response rates for critical updates or calls to action.
Let's get started! First, be sure to check out the following resources:
API documentation: or
Lob dashboard: section or for postcard campaigns
for HTML templates
for ready-to-use creatives and design inspiration
The front side of the postcard is fully available for customization.
For the backside of the postcard, follow the guidance provided in the templates below to leave enough room for ink-free areas.
You may also to your postcards to incorporate personalized tracking.
We use a few pre-approved papers across our commercial printer network. In ensuring uniform quality and consistency across all of our mail pieces; each paper source specification must fall within a small range. The specification/value range pairs are listed below:
Basis Weight: 100# - 120#
Cover GSM: 255 - 325
Full Bleed
1 Side UV Gloss
4x6" Postcards:
W x H: 3.2835 x 2.375"
0.275" from the right edge (including bleed)
0.25" from the bottom edge (including bleed)
All other postcard sizes:
W x H: 4 x 2.375"
0.275" from the right edge (including bleed)
0.25" from the bottom edge (including bleed)
Ensure your postcards get to their final destination by following these guidelines:
The from field is not required for US postcards, but is required for international destinations
For all postcards printed by Lob, a Carbon Neutral Mail certification will automatically be included within the official use address block on the backside. Read more about how you can send mail in a more environmentally responsible way with Lob in our section.
4x6" postcards can only be sent via ; others can be sent as Marketing Mail (Standard Class Mail)
Only 4x6" postcards can be sent to
Postcards cannot include any PII outside of the
Avoid any to ensure your mail does not get rejected by USPS
We do not recommend placing promotional address information in your creative in the bottom 2.375" of a mailpiece opposite the address panel. This will prevent the USPS from accidentally scanning the wrong side of the mailpiece.