A GS1-based overview of size, contrast, human-readable data and placement decisions.
A barcode on a hang tag is not only a graphic element. Making it too small can reduce scanning reliability, so available space should not compromise function.
Contrast matters as well. Black bars on a white background are among the most reliable combinations; alternative colors should be tested under real scanning conditions.
Human-readable numbers can help when a symbol is damaged. Placement should also account for holes, strings, folds, cutting margins and the final position of the tag.
This article is general information. Verify current rules and technical requirements for your specific product and market.