{"section":"tutorials","requestedLocale":"en","requestedSlug":"what-is-an-sku","locale":"en","slug":"what-is-an-sku","path":"docs/en/tutorials/catalog/products-and-skus/what-is-an-sku.md","branch":"main","content":"SKU (*Stock Keeping Unit*) is the physical unit of the product in inventory. In the VTEX Catalog, the SKU corresponds to the product variation and contains the characteristics that make it a specific item, such as color and size.\n\nFor example, if your store's product is \"Shirt\", its SKUs can be \"Blue Shirt\", \"Red Shirt\", and \"White Shirt\". You can also combine characteristics, such as \"Blue Shirt L\", \"Red Shirt M\", and \"White Shirt S\".\n\nIn the Catalog hierarchy, the SKU is immediately below the product. First, you define the product information and then create the associated SKUs.\n\n## Learn more\n\n* [Products](/en/docs/tutorials/what-is-a-product)\n* [Differences between product and SKU](/en/docs/tutorials/what-is-the-difference-between-product-and-sku)\n* [Adding or editing SKUs](/en/docs/tutorials/adding-or-editing-skus)"}