PrepLabelQuick answer: To print FNSKU labels on a 2 × 1 in thermal printer, enter your FNSKUs above with the 2 × 1 in roll selected, download the PDF, then print it with the paper size set to 2 × 1 in (50.8 × 25.4 mm) and scaling at 100%. Each PDF page is one label, so the printer feeds exactly one label per page.
Why 2 × 1 in labels need their own layout
FNSKU label PDFs from Seller Central are usually laid out for sheets of 21 to 44 labels. Sending a sheet layout to a thermal printer either shrinks the whole page onto one small label or prints a single corner of it. A 2 × 1 in label also leaves little room: an FNSKU barcode is 145 modules wide, so on 2 inches each bar module can only be about a quarter of a millimetre. That's fine for scanners if the bars are crisp, and crisp bars on a 203 dpi printer means every bar must be a whole number of printer dots.
PrepLabel lays out each label at the real size and snaps the module width to the printer: two dots (0.25 mm) at 203 dpi or three dots (0.254 mm) at 300 dpi, with at least 1/4 in of clear space each side of the bars when it fits.
Settings for popular 2 × 1 in thermal printers
| Printer | Resolution | What to set when printing the PDF |
|---|---|---|
| Rollo (USB or wireless) | 203 dpi | Paper size 2 × 1 in (or 50.8 × 25.4 mm), scale 100%, orientation landscape |
| Zebra desktop (GK420d, ZD411, ZD421 and similar) | 203 or 300 dpi | Label size 2 × 1 in in the Zebra driver, Actual size; or skip the driver and send ZPL |
| Munbyn and other 4-inch thermal printers | Usually 203 dpi | Add a 50.8 × 25.4 mm paper size in the driver if it's missing, scale 100% |
Check your own model's resolution in its manual. If it differs, change it under Printer and alignment in the tool; the summary above the preview shows the resulting bar width in millimetres and mils.
How to print FNSKU labels on a Rollo
- Load the 2 × 1 in roll and let the Rollo detect the label size and gap. If labels start to drift, re-run the label detection described in your Rollo's manual.
- Enter or import your FNSKUs above, keep 2 × 1 in thermal roll selected and click Download PDF.
- Open the PDF and print to the Rollo. Choose the 2 × 1 in paper size and turn off “fit to page” or “scale to fit”.
- Print one label first, scan it, then print the rest. The PDF already contains one page per unit.
Fixing common 2 × 1 in problems
- Every label prints across two labels: the paper size is still Letter or 4 × 6. Select 2 × 1 in, then recalibrate the gap sensor.
- Label is rotated or cut off: some drivers expect portrait pages. Set Rotate each label to 90° under Printer and alignment.
- The title is cut short: 2 × 1 in has room for one title line. PrepLabel keeps the start and end of the title, or switch to a 2.25 × 1.25 in roll for two lines.
- Long merchant SKUs don't fit: the tool warns when bars would get too thin. Use 3 × 1 in labels for SKUs over about 12 characters.
FAQ
Will a 2 × 1 in FNSKU label scan at the fulfillment center?
It should if it prints crisp at 100% scale with enough clear space around the bars. Amazon's guidance has described labels between 1 × 2 in and 2 × 3 in, and 2 × 1 in is a common choice. Test-scan a label before labeling a shipment.
Should I choose 203 dpi or 300 dpi?
Choose the resolution your printer actually has. Most Rollo, Munbyn and entry-level Zebra printers are 203 dpi. PrepLabel uses it to size the bars in whole printer dots.
Can I print 2 × 1 in labels from a Mac or Chromebook?
Yes. PrepLabel runs in the browser and makes a normal PDF, so any system that can print a PDF to your thermal printer works.
Why does my 2 × 1 in label print tiny in one corner?
The print dialog is using a Letter or 4 × 6 paper size and shrinking the page. Pick the 2 × 1 in paper size and print at Actual size.
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Last updated · Written by the MiniTools team. General information, not legal advice. Amazon changes its rules, so confirm current requirements in Seller Central.