If you want to have different SKUs or quantities for your product variants, you have to update the setting for the product on Etsy. Here is a screenshot that shows you where to update the setting. Related ArticlesProducts in SumtrackerUpdating same inventory for multiple product listingsHow does Sumtracker Sync Etsy Listings?What information is stored from BigCommerce Products in Sumtracker?Inventory is not matching between Sumtracker and my store: How can I resolve them?