How to use
Step 1
Get FNSKU from Seller Central
Manage Inventory → product → dropdown → "Print item labels". Your FNSKU is shown (e.g. X001ABCD12).
Step 2
Select CODE128 format
FNSKU barcodes must be CODE128. This is preselected above.
Step 3
Download SVG for print
SVG is vector — stays sharp at any label size or DPI. PNG works too at high resolution.
Amazon Barcode Requirements
FNSKU starts with X0, B0, or X00 followed by letters/numbers
Format must be CODE128 — not EAN, not QR code
Minimum label size: 1 in × 2 in (25×50mm)
White background, no decorative borders
Human-readable FNSKU text must be visible below barcode
Label must fully cover any existing product barcode
⚠️Do not buy barcodes from resellers. Sites selling "10 barcodes for $5" provide codes registered to other companies. Amazon checks against the GS1 database — your listing can be suspended. Register directly at gs1.org.
Amazon FBA Label Size Guide
| Label Type | Minimum Size | Format | Notes |
|---|---|---|---|
| FNSKU Unit Label | 1 in × 2 in (25×50mm) | CODE128 | One per sellable unit |
| Shipping Box Label | 4 in × 6 in (100×150mm) | Seller Central | One per shipping box |
| Suffocation Warning | 1 in × 1 in (25×25mm) | Text | Poly bags >5 inch |
| Expiry Date | 1 in × 2 in (25×50mm) | Text | Food, health, cosmetics |
| Set / Bundle | 1 in × 2 in (25×50mm) | Text + barcode | "Sold as set" |
✅ Pro tip: Always download SVG for thermal printers (Zebra, Rollo, Dymo) — perfect quality at any size.
FAQ
What does FNSKU stand for?
Fulfillment Network Stock Keeping Unit. Amazon assigns it to track your specific inventory through its fulfillment network.
Where do I find my FNSKU?
Seller Central → Manage Inventory → select your product → dropdown → "Print item labels".
Is FNSKU the same as ASIN?
No. ASIN identifies the product globally. FNSKU identifies the product as belonging to your seller account.
What format is the FNSKU barcode?
CODE128. Not EAN-13, not QR code, not CODE39. Always use CODE128 for FNSKU labels.
Generate Your FNSKU Barcode — Free
CODE128 format, FBA ready, no signup.
▌▌ Create FBA Barcode — Free