Overview

Amazon is introducing a size‑normalisation system that will automatically reformat the way dimensions are shown on both search listings and product detail pages. The feature pulls from the structured attributes in the catalogue and presents the information in a uniform, region‑specific style. Sellers need to verify that their size‑related fields are complete and correct before the rollout reaches full scale.

Key Points

• Uniform display — Amazon will replace free‑form seller text with a consistent size label generated from catalogue data.
• Regional units — The same product will show inches to U.S. shoppers and centimetres to customers in the U.K., based on the buyer’s locale.
• Automatic activation — The change is applied to eligible categories without any opt‑in process.
• Attribute‑driven output — Item dimensions, volume, and unit count are the only data sources used to build the displayed size.
• Scope limited to certain categories — Clothing, footwear, food & beverage, beauty, and home goods are among the first groups affected.

How Size Normalisation Works

1. Data extraction — Amazon reads the structured fields (length, width, height, weight, capacity, unit count) that sellers have entered for each ASIN. Example: a 12 × 8 × 4 in. box with a capacity of 2 L will be captured from those fields.
2. Standardised label creation — The platform combines the extracted values into a single size string that follows Amazon’s formatting rules. Example: the previous data becomes “12 × 8 × 4 in | 2 L” on the U.S. site.
3. Locale adaptation — Before the label reaches the shopper, Amazon converts the measurement units to match the buyer’s region. Example: the same product appears as “30 × 20 × 10 cm | 2 L” for a U.K. customer.
4. Display on search and detail pages — The generated label replaces any seller‑written size text in both the search results grid and the product detail view.