Guides
- Free for commercial use
- No sign-up
- Nothing uploaded
Short guides that answer the questions sellers ask before they print a barcode. Each one is checked against GS1's standard or Amazon's help pages and lists its sources at the end; forum reports are labeled as such.
- Do I need a GS1 barcode?
When you need a GS1 number for a U.P.C. barcode, what Amazon is reported to check, the risk of resold numbers, and Amazon's FNSKU labels for resellers.
- UPC, EAN and GTIN explained
What each term means, how the number lengths match the barcodes, how the check digit works and who issues the numbers.
- Barcode size guide
GS1's smallest, standard and largest sizes for UPC-A, EAN-13, ITF-14 and GS1-128, quiet zones, and the smallest size each printer can make.