How many postcards should I send for a test campaign?

To get results you can trust, send a large enough sample per version. A minimum of 1,000 to 2,000 postcards per variation gives you statistically meaningful data before you scale.

• Per variation: 1,000 to 2,000 cards for reliable numbers.
• Two designs: that means 2,000 to 4,000 total pieces.
• Track each version: use unique codes or dedicated landing pages so you know which won.

This sample size lets you confidently identify the best design, offer, or audience segment before committing to a full run.