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Technical Reference

Amazon FBA Label Size & Margin Guide

Label sizes, spacing and placement guidance for Amazon FBA item, box and pallet labels, with the Amazon sources we used.

Label Specifications

FBA Label Sizes at a Glance

MOST COMMON

FNSKU Item Label

Applied directly to each unit of product

Size1 to 2 in tall × 2 to 3 in wide
Examples1" × 2", 1" × 3" or 2" × 2"
Quiet zonemore than 0.25 in (6.4 mm) left/right, more than 0.125 in (3.2 mm) top/bottom (Amazon's archived spec)
Barcode formatCode 128 (archived spec: Code 128A)
PrinterAmazon suggests a laser printer at 300 DPI for best results
Generate FNSKU Label

2D Box Content Label

One way to provide box content information

Our generator outputs4×6 in, 100×150 mm, A4, Letter
Barcode formatPDF417 (2D) in our generator; Amazon's help also lists Data Matrix and QR Code
Make box content labels

Shipment / Pallet Label

Large format label for palletised shipments

Per palletLabels on all four sides of each pallet (Amazon staff guidance)
PlacementDo not fold over edges
SourceGenerated in Seller Central

Generated automatically in Seller Central during shipment creation

Quiet zones

Understanding the Quiet Zone

The quiet zone is the clear area surrounding a barcode. Amazon's archived item-label specification lists a barcode "with appropriate quiet zone areas" as required label content. The quiet zone helps a scanner find where the barcode starts and ends (our own explanation).

Quiet zone guidance

FNSKU Item Label (Code-128) more than 6.4 mm left/right, more than 3.2 mm top/bottom (Amazon's archived spec)
Shipment (carton) label same figures in Amazon's archived shipping-label spec

Common quiet zone problems

✗Text or product description printed within the quiet zone margin
✗Another barcode printed adjacent to the FNSKU without adequate spacing
✗Label applied too close to the edge of a product where the surface curves
✗Barcode too close to the edge of the label stock itself
✓Test-scan a printed label before labelling stock
Thermal vs A4

Thermal Printing vs A4 Sheet Labels — Which Is Better?

This is one of the most common questions from newer FBA sellers. Both approaches can work, but they have different strengths and failure modes. Here's what experienced prep centre operators know that beginners don't.

🖨️ Direct Thermal Printer

✓Consistent output — same result every time
✓No ink/toner costs — only label media
✓Labels feed individually — no cutting
✓Better for high-volume prep (50+ units/day)
✗Upfront cost (£100–£400 for a good printer)
✗Heat-sensitive — don't leave in hot vehicles

📋 A4 Sheet Labels

✓Works with any inkjet or laser printer
✓Lower initial cost — no specialist hardware
✓Good for low-volume or trial batches
✗Must verify print scale every time
✗Inkjet labels can smudge in humid conditions
✗Partially used sheets are tricky to reuse correctly

What Are the Most Common FBA Label Size Mistakes?

Amazon’s fulfilment centres process millions of items daily. Amazon's guidance gives a label size of 1 to 2 inches tall and 2 to 3 inches wide, and says Amazon may refuse, return, or repackage products that arrive with inadequate or non-compliant packaging, at your expense. Here are the mistakes we see most often.

Printing at “Fit to Page” instead of 100% Scale

The most common mistake. When your printer is set to “Fit to Page” or “Scale to Fit”, it shrinks the barcode to add margins. Print at 100% (Actual size). Scaling shrinks the barcode and its white space, which can make it harder to scan. Always check your print dialog and select “Actual Size” or set scale to 100%.

Ignoring the quiet zone

Amazon's archived item-label specification called for a quiet zone of more than 0.25 in (6.4 mm) at the left and right of the barcode and more than 0.125 in (3.2 mm) above and below it. This blank space tells the scanner where the barcode starts and ends. If text, other labels, or the edge of the packaging intrudes into this zone, the barcode may be harder to scan.

Using the Wrong Label Stock for Your Printer

Thermal printers need direct thermal labels — not inkjet or laser stock. If you put the wrong label type through a thermal printer, the barcode may appear faded, smudged, or completely blank. Always match your label stock to your printer type: direct thermal for thermal printers, matte white for laser printers. Amazon's guidance calls for black ink on non-reflective paper.

What Label Settings Should I Use for My Printer?

Printer Type Recommended Label DPI Setting Key Setting
Zebra ZD421 / GK420d60mm x 30mm direct thermal roll300 DPIDarkness: 8-10
Dymo LabelWriter 45025mm x 54mm (or 57mm x 32mm)300 DPIPrint quality: Best
Brother QL-820NWB29mm x 62mm DK label300 DPIScale: 100%
Laser (A4 sheets)21-up or 24-up matte white600 DPIActual Size, no scaling
Inkjet (not recommended)Matte white only300+ DPIAvoid — ink can smudge

Printer settings above are our suggestions, not Amazon requirements. Amazon's guidance: "Laser printer at 300 DPI for best results". Amazon's guidance gives a label size of 1 to 2 inches tall and 2 to 3 inches wide, printed in black ink on non-reflective paper with adhesive backing.

Corrections? Let us know