Child ASIN

On Amazon, products with multiple variations are structured using a Parent-Child ASIN relationship:

• The Parent ASIN is not a sellable item itself; it's used to group variations on the product detail page.
• Each Child ASIN represents one specific variant - for example:
  • A t-shirt (Parent ASIN) might include Child ASINs for sizes S, M, L and colors black, white, red.
  • A chocolate bar might have Child ASINs for milk, dark, and white flavors.

Benefits of this structure:

• Customers can easily switch between options without leaving the page
• Reviews, questions, and rankings often aggregate under the parent
• Helps improve discoverability and conversion

Who uses it:

• 3P Sellers via Seller Central
• 1P Vendors via Vendor Central

💡 Example:
Parent ASIN: Chocolate Bar (generic listing)
Child ASINs:

• B07M5YB1Q9 - Dark Chocolate
• B07M5YB2D8 - Milk Chocolate
• B07M5YB3KT - White Chocolate

In short: A Child ASIN is one variation (like size or flavor) of a product listed under a shared Parent ASIN, enabling a unified shopping experience for customers.