What KH 1.5 Postcards Are and Why They Matter
KH 1.5 postcards refer to cards printed at 5 inches by 3.5 inches, a compact format that balances detail with portability. This size is popular for invitations, announcements, event promotions, and small-business mailers because it fits easily in standard envelopes and handholds well. The "KH" commonly indicates a card intended to be printed at this exact scale, enabling consistent branding and predictable mailing costs. Understanding the basics of KH 1.5 postcards helps you make informed choices about paper, finishes, and messaging for long-term impact.
Standard Size and Common Uses
The 5 x 3.5 inch dimensions make KH 1.5 postcards ideal for direct mail, event invites, and follow-up marketing pieces. Their compact size keeps printing and postage costs lower than larger formats while still allowing room for headlines, key details, and a call to action. This format works well for local businesses, nonprofits, and individuals who want a polished, professional look without the complexity of larger pieces. The compact format also supports higher per-piece quality when printed in small runs.
Key Specifications at a Glance
| Attribute | Verified Detail | Source Type |
|---|---|---|
| Size | 5 in x 3.5 in (127 mm x 89 mm) | Industry standard |
| Typical GSM | 250–350 g/m² cardstock for premium feel | Printer guidelines |
| Common Finish | Matte or gloss UV coating | Typical commercial options |
| Common Usage | Invitations, announcements, promotions | Industry practice |
| Postage | First-class or marketing rate depending on design | USPS guidelines |
Finish and Paper Options
Selecting the right finish affects look, feel, and durability. Matte finishes provide an understated, elegant appearance with minimal glare, while gloss coatings add vibrancy and protection. For mailed pieces, a aqueous coating or UV spot coating can improve resistance to fingerprints and wear. Heavier cardstock (250–350 g/m²) conveys quality and reduces curling, especially for folded mailed pieces.
Design Considerations
Because the format is small, prioritize clear hierarchy: a bold headline, succinct body copy, and a prominent call to action. Use generous margins and simple imagery to avoid crowding. Account for safe zones and bleed when preparing files, and confirm exact trim dimensions with your printer. For invitations, consider adding a reply card or QR code to a digital RSVP to streamline responses.
File Prep and Print Production
Preparing files correctly reduces reprints and ensures color accuracy. Use CMYK color mode, set resolution to 300 dpi for images, and convert text to outlines or embed fonts when allowed. Confirm page size, bleed, and slug with your printer, and request physical proofs for critical matches. For consistent results across runs, lock in paper stocks and coatings with your vendor.
Cost, Turnaround, and Practical Tips
Cost per piece typically decreases with higher volume, so compare quotes for 250, 500, and 1,000 unit runs. Turnaround varies by printer workload and finishing choices, so plan proofing time into your schedule. Track mailing dates carefully if coordinating with events, and order a small test batch when appearance or color accuracy is critical. Store postcards flat in a cool, dry place to prevent curling before distribution.
Strategic Takeaways
- Size advantage: 5 x 3.5 in fits standard envelopes and keeps costs manageable
- Finish matters: choose matte or gloss based on desired tone and durability needs
- Design clarity: use strong headlines, concise copy, and prominent CTAs
- Proof carefully: request physical proofs for color, paper, and finish confirmation
- Volume planning: balance per-piece savings against storage and timing