Overview

Amazon has upgraded its self‑service size‑chart builder to include instant validation that catches mistakes the moment a file is uploaded. The enhancement, launched this month, splits feedback into mandatory corrections and optional improvement tips, giving sellers a clearer path to error‑free charts. Apparel, footwear and other size‑dependent sellers should see fewer rejections and a drop in size‑related returns.

Key Points

• Instant validation — The tool now scans a size‑chart file the second it is dropped into the uploader, highlighting missing columns or mismatched units before the submission is finalized.
• Mandatory error alerts — Errors that block the upload, such as absent size identifiers or duplicate ASINs, are presented with step‑by‑step instructions on how to fix them.
• Optional improvement suggestions — Non‑critical recommendations, like adding a “model height” field or using standardized measurement units, appear as advisory notes that do not stop the upload.
• Two‑tier feedback system — Sellers receive a clear visual separation between “must‑fix” items (red flags) and “nice‑to‑have” suggestions (yellow highlights), reducing guesswork.
• Brand Registry requirement – Only sellers enrolled in Amazon Brand Registry can access the upgraded tool, and it is available across the US, UK and EU marketplaces.
• Potential return reduction — Early error detection helps prevent inaccurate charts from reaching shoppers, a known driver of apparel returns.

How the Real‑Time Feedback System Works

1. Upload initiation — When a seller drags a CSV or Excel size‑chart template into the size‑chart portal, the system instantly parses the file. Example: A seller uploading a women’s‑t‑shirt chart with columns for “Size”, “Chest (in)”, and “Length (in)” sees the tool begin a scan within seconds.
2. Mandatory error detection — The validator checks for required fields, duplicate ASIN entries, and unit mismatches. If a required column like “Waist (cm)” is missing, the tool displays a red banner stating, “Missing required column: Waist (cm). Add this column to proceed.”