SKU
Warehousing & 3PLStock Keeping Unit
A unique code for one specific product variant, used to count and track stock.
In practice
A red size M shirt and a blue size M shirt are two SKUs. Warehouses store, pick, and report by SKU. The SKU count drives WMS complexity and pick charges.
Seen in the wild
Inbound 12 pallets, 8 SKUs, mixed cartons.