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General Amazon

SKU (Stock Keeping Unit)

A unique identifier you assign to each product variant in your inventory. Used internally for tracking, unlike ASIN which is Amazon's identifier.

What Is a SKU?

A SKU (Stock Keeping Unit) is your own internal product identifier. You create it when listing a product. Unlike ASINs (which Amazon assigns), SKUs are seller-defined and can encode useful information like supplier, color, size, or batch.

SKU Best Practices

Use a consistent naming convention: SUPPLIER-CATEGORY-SIZE-COLOR (e.g., SUP01-KITCHEN-LG-BLK). This makes inventory management and reporting much easier at scale.

Related Terms

ASIN (Amazon Standard Identification Number)

A unique 10-character alphanumeric identifier assigned by Amazon to every product in its catalog. Starts with "B0" for most products.

FNSKU (Fulfillment Network Stock Keeping Unit)

Amazon's internal barcode for FBA inventory that links a product to a specific seller's account. Prevents commingling of inventory between sellers.

Track This in SellerLegend

Inventory Management & Forecasting

Prevent Amazon FBA stockouts and reduce excess inventory costs. Track sales velocity across multiple time periods, get a recommended purchase date, and get data-driven quantity recommendations to maintain optimal stock levels.

Product Performance Tracking

Track individual product performance with detailed analytics by SKU, ASIN, parent ASIN, brand, or custom product groups. Monitor sales velocity, conversion rates, profit margins, and inventory levels with frequently-synced data to identify bestsellers and underperforming products.

Want to track this metric continuously?

SellerLegend gives you a frequently-updated dashboard with all the Amazon metrics that matter.

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