The 4 × 6 inch shipping label is a common logistics format because it provides enough space for addresses, barcodes and routing information while fitting standard thermal-label workflows.
What is a 4×6 shipping label?
A 4 × 6 inch label measures approximately 101.6 × 152.4 mm. In Brazil it is often referred to as a 10 × 15 cm label. Small differences between 100 × 150 mm and the exact 4 × 6 inch size can matter when a file is positioned very close to the page edges.
When converting a label to PDF, choose the size that matches the source whenever possible. This keeps text, codes and margins close to the intended layout.
Why scale matters
Automatic fit options can be useful, but they should not be the default for every file. Scaling changes both the text and the machine-readable elements on the page.
If a barcode becomes too narrow, too small or blurred, a scanner may have difficulty reading it. Always review the PDF at actual size and avoid browser print settings that apply an additional fit-to-page transformation.
Margins and printable area
Some printers cannot print all the way to the physical edge of a label. If important text or a barcode is too close to the border, part of it may be clipped.
A preview helps identify content outside the expected area before paper is wasted. The most important information should have enough clear space around it.
Print quality and DPI
203 DPI is common for thermal shipping-label printers and can work well when the source layout and text are designed appropriately. Higher DPI can preserve more detail, but the source content still needs to use readable font sizes.
When sender or recipient details look thin, the rendering process should preserve character edges without thickening barcodes or QR codes.
Practical printing checklist
Use the correct page size, disable unnecessary printer scaling, verify label orientation, check the barcode visually, and print one test label before processing a large batch.
This workflow is especially useful after changing a browser, printer driver, label roll or conversion tool.
Apply what you learned directly with the free Ajuda Seller tools.
Open Ajuda Seller tools →Frequently asked questions
Is 10×15 cm the same as 4×6 inches?
They are commonly treated as equivalent in shipping workflows, but exact 4×6 inches is 101.6 × 152.4 mm.
Should I use fit to page when printing?
Only when necessary. Extra scaling can change barcode dimensions and text size.
What DPI is common for shipping labels?
203 DPI is very common, while 300 DPI is also used when finer detail is needed.