What is an FNSKU?
The FNSKU (Fulfillment Network Stock Keeping Unit) is the code Amazon uses to identify your units in its warehouses, so your stock isn't mixed up with another seller's stock of the same product. It is usually 10 characters starting with X00. You'll find it in Seller Central under Inventory → Manage FBA Inventory, or on the listing's Print item labels page.
What Amazon wants on the label
- A scannable Code 128 barcode of the FNSKU, with the FNSKU printed below it.
- The product name (shortened is fine) and its condition, such as New.
- A label between 1" × 2" and 2" × 3", with removable adhesive that comes off cleanly.
- The label must cover any other barcode on the pack (UPC or EAN), so only one barcode is scannable.
Requirements change from time to time, so check Amazon's current FBA product labelling requirements in Seller Central before a big shipment.
How to print FNSKU labels
- Copy the FNSKU from Seller Central and paste it into the box. One line per product.
- Type the product name under Line above and the condition under Line below. For several products, give each line its own text:
X001ABCD12 | Ceramic mug navy | New. - Set Copies of each to the number of units you are sending.
- Choose Avery 5160 / 8160 – 30 per sheet for a laser printer, or 2.25" × 1.25" for a thermal printer.
- Print at 100% (Actual size) and scan one label with your phone before labelling the whole shipment.
Why make labels here instead of Seller Central?
Seller Central's PDF labels work well. Use this tool when you want a different sheet or thermal size, a clearer product name, labels for several products on one sheet, or to finish a partly used sheet with Skip labels already used.
Do I need a UPC as well?
To create most listings, Amazon asks for a GTIN (UPC or EAN) licensed from GS1, unless you have a brand exemption. The FNSKU label is for the warehouse; the UPC identifies the product in Amazon's catalogue. Make the UPC barcode for your packaging with our UPC generator.
