Barcode Label Printing Tips: Get Perfect Labels Every Time

Printed your barcode labels only to find the scanner won't read them? Or the labels don't line up with the sheet? These are the most common problems — and all of them are fixable with the right settings.

1. Always Print at 100% Scale

The #1 mistake when printing barcode labels is letting the printer or PDF viewer rescale the document. Any scaling — even 95% or 105% — makes barcodes unscannable because it changes the width of the bars. In your print dialog, always set Scale to 100% (Actual Size) and disable "Fit to Page" or "Shrink to Fit".

2. Use the Right Label Sheet Size

Standard label sheets come in A4 (Europe) or Letter (US). Make sure your PDF is generated to match the sheet you're printing on. Common sizes:

• A4 — 210×297mm, standard in Europe
• US Letter — 8.5×11 inches, standard in North America
• Avery 5160 — 30 labels per sheet, popular for small labels

3. Use a Laser Printer for Best Results

Inkjet printers can smudge barcodes, especially if labels are handled frequently. Laser printers produce sharper, more durable barcodes that scan reliably. If you only have an inkjet, let labels dry for 30 seconds before handling.

4. Test Scan Before Printing in Bulk

Always print one test sheet first and scan several barcodes with your barcode scanner or a smartphone app (e.g. Google Lens). Confirm that:

• The scanner reads the correct value
• Labels align properly with the sheet perforations
• Text below the barcode is legible

5. Minimum Barcode Size

Code 128 barcodes need a minimum width of about 25mm (1 inch) to be reliably scanned by most scanners. If your labels are very small, use shorter barcode values or a denser format. The quiet zone (white space on each side of the barcode) must be preserved — never crop it.