A SKU (stock keeping unit) represents a purchasable instance of a product on your store. Customers do not actually purchase products, they purchase SKUs. A product can have several different SKUs associated with it, representing varieties, sizes, and colors. For example, the product Sundress, which is available in two different colors and five sizes, has ten associated SKUs, one for each size/color combination. Each product must have at least one SKU.
You create SKUs by combining a product’s variant properties. If a product was created from a product type that has no variant properties, you will not be able to create SKUs for it, though the system automatically creates a single SKU for it when you create the product.
This section includes the following topics:
