troubleshooting guide
Fix shipping label pdf has the wrong page size. Check paper size, print scale, orientation and printer setup before reprinting.
Best next step
Start with the tool or template that matches this guide before printing paid postage again.
Last reviewed: 2026-06-15
A shipping label PDF can appear to have the wrong page size when the marketplace, carrier, browser, or printer driver is mixing Letter, A4 and 4×6 formats. Identify the PDF page box first, then match paper and scale to that source layout.
Symptom-led fix
Follow the symptom that best matches your bad print. Each step points to the safest next tool before you buy postage again.
A full Letter or A4 page is being fitted onto one 4×6 thermal label.
Inspect the PDF page box. Get the issuer's 4×6 format or extract only a complete label area; do not enlarge the miniature output.
Inspect the PDF pageA true 4×6 source prints proportionally smaller on matching 4×6 media.
Confirm 4×6 in the driver, disable Fit, print one blank template, then calculate a correction only if the media path already matches.
Measure the scale errorThe label boundary is correct, but fine lines are fuzzy, gray or broken.
Treat this as print quality, not page scale. Test density, speed, media and printhead condition before another live label.
Run a print-quality testUse a PDF viewer properties panel or the local PDF analyzer to see whether the source page is Letter, A4, 4×6 or another size before choosing printer settings.
The PDF page size describes the file; the printer media describes the paper or roll. Problems happen when a full-sheet file is sent to a 4×6 printer or a 4×6 file is auto-fit to a sheet.
If you extract a label area from a larger PDF, keep every barcode, QR code, service mark, address and quiet-zone whitespace intact.
After choosing the output size, print a blank template at 100% and measure it before printing a paid label.
This page is a practical print-setting checklist, not official carrier policy or a promise that a label will be accepted.
Confirm the current format in your platform or carrier account, keep the original PDF, and stop if a test print is cropped, blurred or incorrectly scaled.
Troubleshooting advice is general. Record the printer model, paper size, PDF viewer and scale setting so you can verify each change.
Open the PDF properties or use the local PDF analyzer before printing. Check whether the page box is 4×6, Letter, A4 or a larger sheet containing a smaller label area.
Start by matching the printer paper to the PDF page size. If you need a different output size, extract the label area intentionally instead of letting Fit to Page shrink the whole file.
The driver may be fitting the entire Letter page onto one 4×6 label. That shrinks the barcode and address block. Extract the label area or choose the correct label format first.
Only crop when every barcode, QR code, address, service mark and quiet-zone area stays complete and unscaled. Reprint on the source paper size if the required content will not fit.
Print a blank 4×6, Letter or A4 template at 100%, measure it, then print one label and check barcode quiet-zone whitespace before mailing.
Fix browser margins, headers and hidden scaling controls.
Check Preview paper size, scale and saved printer presets.
Check paper, scale and orientation before printing.
Download a blank 4×6 shipping label template.
Fix tiny labels, scaling problems and bad print settings.