1
Whole label is smaller
The 4×6 boundary measures around 3.7×5.6 or the barcode looks compressed.
Disable Fit to Page, choose Actual Size, then calculate the correction if the ruler measurement is still off.
Calculate corrected scaletroubleshooting guide
Royal Mail Label Prints Too Small — How to Fix It
Fix royal mail label prints too small without shrinking, cropping or blurring the barcode. Check paper size, scale, orientation and printer setup before shipping.
Best next step
Follow the symptom-led steps before buying or reprinting postage.
Start with the tool or template that matches this guide before printing paid postage again.
Quick answer
A Royal Mail label that prints too small is usually being scaled from an A4 page or browser preview. Print the PDF at Actual Size on the correct paper, and do not crop into the barcode or QR-code area.
- Recommended size
- 4 × 6 in
- Print scale
- 100%
- Orientation
- Portrait
Symptom-led fix
Find the cause before reprinting
Follow the symptom that best matches your bad print. Each step points to the safest next tool before you buy postage again.
Print one test at 100% / Actual Size first.
2
Printed from browser preview
The browser added margins or shrank the PDF to fit the sheet.
Download the label PDF and print from a PDF viewer at 100% before changing marketplace settings.
Check PDF page size3
New printer or roll
Every label from this printer is slightly small.
Run a calibration sheet so you know whether the printer driver or the label file is causing the shrink.
Print calibration sheetKnow whether the label is A4 or 4×6
Royal Mail workflows often produce labels intended for sheet printing, label rolls, or integrated labels. Check the PDF page size before choosing the printer media.
Use A4 for sheet output
For a regular printer, select A4 paper and 100% / Actual Size. Disable headers, footers, Fit to Printable Area and other settings that shrink the label block.
Use 4×6 only when the label area fits
For a 4×6 thermal printer, make sure the label area can fit without shrinking the barcode or QR code. If the file is A4, extract the label area rather than scaling the full page.
Check codes and customs text
International or tracked labels may include multiple codes and service marks. Do not fold, trim or tape through those areas.
Source notes
This guide is based on recurring seller-support patterns: labels printed from browser previews, PDF viewers resizing files, thermal rolls loaded off-center, and barcodes losing quiet-zone whitespace.
When a platform or carrier offers a specific label-format setting, follow that official setting first, then use the checker and templates here to confirm print scale, paper size, orientation, and barcode quiet zone before shipping.
For troubleshooting, prioritize fixes that include printer model, paper size, PDF viewer, and scale setting before reprinting paid postage.
FAQ
Should I re-buy postage?
Usually no. First fix the print settings and reprint the original PDF if your platform allows it.
Why does Actual Size matter?
Barcode scanners expect the bars and quiet zone to remain within tolerance. Shrinking can make scans fail.
Can tape cause scanning problems?
Yes. Glossy tape over a barcode can reflect light and reduce scan reliability.
What should I try first if I am in a hurry?
Download the label PDF, print from a PDF viewer at 100% / Actual Size and make sure the selected paper size matches the paper in the printer.
How do I know whether the printer or the label file is the problem?
Print a blank template at 100%. If the template is also wrong, fix printer settings before changing the label file or buying new postage.