Error 90171 — Item dimensions are missing or invalid

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

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

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.

• Mixing units (length in inches, weight in kilograms) without declaring units — defaults to wrong
• Submitting product dimensions instead of packaged dimensions for FBA — Amazon needs the box, not the bare product