SKU (Stock Keeping Unit)
A unique internal identifier for a distinct, sellable product variant.
Also known as: SKU, stock keeping unit
What is SKU (Stock Keeping Unit)?
A SKU (Stock Keeping Unit) is a unique internal code a business assigns to each distinct, sellable variant of a product — a specific size, color, or pack configuration. Unlike a GTIN or UPC, a SKU is proprietary to the company that creates it and is used to track inventory, sales, and margin. SKU proliferation — creating variants faster than they earn their keep — is one of the most common drags on operational clarity.
How Endless handles it
Endless keeps one canonical SKU record across every channel and warehouse, so on-hand, sell-through, and margin roll up to a product instead of scattering across disconnected systems.
Related terms
Browse the full commerce operations glossary.
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