Label & Barcode Guide
Label sheet sizes in millimetres, which barcode type to use, how the EAN check digit works, why labels print misaligned, quiet zones, CSV merges, and what a GTIN really is.
- Label sheet sizes in millimetresEvery label layout we support, with exact label size, grid, page margins and pitch in millimetres — plus the Avery-compatible code for each.
- Which barcode type should you useWhich barcode symbology to use for retail, internal stock, cartons or asset tags — what each one can encode and how long it has to be.
- How the EAN check digit worksThe mod-10 calculation behind EAN-13, UPC-A, EAN-8 and ITF-14 check digits, worked step by step, plus the mistakes that make a number invalid.
- Why labels print misalignedScaling, printer margins and driver settings that shift a label sheet by a few millimetres, and the one-page test that finds the cause in a minute.
- The 4 × 6 shipping labelHow the 100 × 150 mm thermal shipping label works, what to send a roll printer, and when to use a carrier's own label instead of making one.
- Barcode size and the quiet zoneWhat the module width and quiet zone are, the minimums we warn at, and why a barcode that looks fine on screen refuses to scan on paper.
- Printing labels from a spreadsheetTurn a spreadsheet of addresses or SKUs into a sheet of labels: delimiters, column mapping, sequential numbering and the Excel export traps.
- SKU, barcode, GTIN: which do you need?The honest answer to "can I make my own barcode": yes for internal stock, no for retail — and what the difference between a SKU, a barcode and a GTIN actually is.
Labels that line up with the sheet you actually bought. Label Sheet lays out address labels, SKU barcodes and shipping labels at the exact millimetres of your sheet, then exports a PDF that prints at 100 per cent. Your data stays in the browser.
Make a label sheet in the browserAvery is a trademark of its owner. We are not affiliated with, endorsed by or licensed by Avery; the codes below are listed only so you can match a sheet you already own to the right dimensions. Always measure your own sheet before a long print run.