Overview

Amazon is introducing an automated size‑normalization engine that will rewrite how quantity and size details appear on both search results and product detail pages. The change, which begins rolling out this quarter, pulls data directly from catalog attributes and converts it into a uniform, region‑specific format. Sellers must ensure their product attributes are accurate, because the new display influences conversion rates and search visibility.

Key Points

• Automated extraction — Amazon reads the unit count and unit count type fields from your feed and generates a single, standardized size string for each listing.
• Localized units — The system automatically converts the base measurement to the buyer’s local unit system (e.g., ounces for U.S. shoppers, milliliters for U.K. shoppers).
• Higher conversion — Amazon’s internal tests show that listings with correctly formatted size values achieve noticeably higher purchase rates than those with missing or malformed data.
• Catalog‑only source — The displayed size comes exclusively from structured catalog attributes; free‑form text entered in the “size” field is ignored.
• No manual overrides — Sellers cannot edit the normalized string directly; any correction must be made by updating the underlying attribute values.
• Cross‑marketplace consistency — A single product listing will show the appropriate unit for every Amazon marketplace where it is sold, eliminating the need for separate regional listings.

How Size Normalization Works

1. Data ingestion — Amazon’s engine scans the product feed for structured fields such as unit count, unit count type, item weight, and item volume.
   • Example: A seller lists a bundle with unit count = 6 and unit count type = "count"; the engine captures these values for processing.
2. — The system combines the captured attributes into a concise, human‑readable phrase that follows Amazon’s style guide.