Overview
Our 4" x 6" printed postcards are the most affordable and widely accepted size for USPS First Class Mail, making them perfect for high-volume campaigns on a budget. Their compact size ensures your message is seen immediately — no envelope to open, just bold, full-color messaging on both sides.
Typical Use Cases:
Limited-Time Offers: Quick promos, discount codes, or flash sale alerts.
Event Reminders: Last-minute “Don’t forget!” mailers for fundraisers, community gatherings, or open houses.
Donor Thank-Yous: Short appreciation notes to acknowledge contributions and keep relationships warm.
Seasonal Greetings: Holiday or milestone cards to maintain regular touchpoints.
Local Awareness Campaigns: Neighborhood service announcements or grand opening invitations.
Design Dimensions
Design Area | Dimensions | Notes |
Full Bleed Size | 4.2" x 6.2" | Extend background color/images to this size for borderless printing |
Trim Zone | 4" x 6" | Finished postcard size after cutting |
Safe Zone | 3.7" x 5.7" | Keep text/logos inside this area to prevent accidental trimming |
Address Block | 2.625" H × 4" W (front side) | Must remain clear for mailing address and postage |
Product Specs
Specs | Details |
Paper Stock | Thick 100# Card Stock |
Printing | Full-color, both sides |
Personalization | Merge fields available for names, discount codes, custom messages |
Addressing and Mailing | Address block + indicia placement required on the front side |
Integration Support | Shopify, Klaviyo, Zapier, and more |
Quick Reference
Full Bleed Size: 4.2” x 6.2”
Trim Zone: 4” x 6”
Safe Zone: 3.7” x 5.7”
Download the Design Template
Click below to access the Canva template for this 4"x6" postcard. It includes pre-set trim zones, safe area guides, and address placement — so you can design confidently without starting from scratch.
Need Help?
Not sure how to format your postcard for print? Contact our team — we’ll make sure your design is USPS-compliant and looks amazing in mailboxes.