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warning 90171

Error 90171 — Item dimensions are missing or invalid

What this means

Your category requires item_height, item_width, item_length, and/or item_weight, and one or more is missing or out of valid range.

Why this happens

Categories that involve shipping, gifting, or sizing need physical dimensions. Apparel sizing categories also use dimensions to verify size charts.

How to fix it

  1. Submit all four dimensions (length, width, height, weight) for items shipped to consumers.
  2. Use consistent units: inches/pounds for US, centimeters/kilograms elsewhere — declare the unit_of_measure attribute.
  3. Don't round excessively — Amazon's shipping calculator uses these for FBA fees, so 0.5" matters.
  4. Resubmit; FBA SKUs may need a 'Cubiscan' measurement if Amazon's measurements differ from yours.

Common pitfalls