What are GS1 Barcode Standards?
GS1 Barcode Standards are global guidelines that define how barcodes should be formatted, printed and placed across different industries including retail, logistics and healthcare.
These standards are developed by GS1 in partnership with industry stakeholders and ensure consistency in how barcodes are used across supply chains worldwide. They outline specifications for barcode size, print quality and placement on packaging.
- Globally recognised standards developed with industry input
- Help ensure the right barcode is used for the right product and process
- Define minimum requirements for quality, positioning and dimensions
- Continuously updated to align with evolving business needs
Benefits of Following GS1 Barcode Standards
- Improves the chance your barcode will scan correctly the first time
- Offers guidance to improve your product marking and coding practices
- GS1 testing and verification gives confidence to retailers
- Helps streamline supply chain operations and visibility
- Reduces the risk of needing to recall or repackage goods
- Accessible to businesses of any size
Understanding GS1 Barcode Standards
Barcode Types
Different barcodes serve different purposes. In Australia and New Zealand, common types include EAN/UPC, GS1-128, GS1 DataBar, ITF-14, GS1 DataMatrix, GS1 QR Code and the newer GS1 Digital Link.
EAN-13 is typically used at retail point-of-sale, while logistic applications rely on GS1-128 within SSCC labels.
Barcode Size
Each barcode type has defined minimum and maximum sizing based on its intended scanning environment, whether it’s at the checkout or in a distribution centre.
Proportions
Barcodes must maintain specific height and width proportions to avoid scanning issues. For instance, EAN-13 width is based on a magnification percentage. Reducing the height (known as truncation) below standard may cause scanning errors.
Quiet Zones
A quiet zone is the blank space before and after a barcode. It signals the start and end of the barcode to the scanner. No images, text or design should appear in this space. Quiet zone size depends on the barcode type and dimensions.
Human Readable Interpretation (HRI)
HRI refers to the printed numbers or letters below the barcode. These are critical for manual entry when scanning fails. Placement depends on the type of barcode being used.
Colours
Use dark bars on a light background for best scanning results. The most reliable combination is black bars on a white background.
Placement
Position your barcode in a consistent and clear area on the packaging. Avoid seams, folds, or locations where damage is likely. Standards vary depending on whether the barcode will be scanned at retail or during transport.
Print Quality
Barcodes should be sharp and clearly printed without smudging or blurring. GS1 uses a formal grading scale to assess barcode quality. GS1 Australia provides Barcode Verification Reports through its testing centres to help businesses meet quality requirements.
GS1 Barcode Standards Checklist
- Barcode meets both minimum and maximum size specifications
- Barcode height complies with required standards
- Quiet zone is present and correctly sized — allow extra space where possible
- Human Readable Interpretation (HRI) is included and properly positioned
- Barcode uses high-contrast colours, such as black bars on a white background
- Barcode is placed in a clear area, free from folds, seams or obstructions
- Orientation of the barcode suits the shape and layout of the packaging
- Barcode has passed verification and validation checks required by retailers
Developed in collaboration with GS1