What is the item limit for my Seller Flex location?
There is no item limit for your Seller Flex.
Are there size or dimension restrictions for Seller Flex?
You can fulfill sortable items via Seller Flex at this time.
For more information, see Product size tiers.
What is the difference between ASIN, SKU, and FNSKU? Which one do I use for scanning my items in WMS?
In the WMS, use FNSKUs or UPCs when receiving inventory into your Seller Flex facility.
An ASIN is an Amazon Serial Identification Number. When several sellers sell the same product, they share the same ASIN. For more information, see the ASIN Creation Policy.
A SKU—or merchant SKU—is the unique identifier you create for your product.
A UPC is a Universal Product Code used in the US and other countries. Many products come with a UPC barcode already attached. For more information, see Product UPCs and GTINs.
FNSKUs are unique identifiers for both the product and the FBA product listing. These automatically generate when you create FBA listings.
How do I print FNSKU labels?
First, verify that your offer is an FBA listing. Creating FBA listings generates the FNSKU.
To print FNSKU or UPC barcodes in Seller Central, go to
> Manage Inventory
Click on Action on on Selected Items(s) to get the frop down menu. Select Print Item Labels from the drop-down for your listing. Next, select the label quantity and size you want to print.
For more information, see Use an Amazon barcode to track inventory.