Amazon FBA Package Dimensions Wrong
TL;DR
When amazon fba package dimensions wrong, two records can agree and both be off. We measured one listing and found a 50% volume error. Here is how to check yours.
✨ AI-assisted research, automated editorial review by Avanta Global EOOD. Learn more
Short answer: Our catalogue record and inventory-planning record both said the same thing about our package size — and both were wrong. On one listing on our Amazon.com.au account, the amazon fba package dimensions wrong issue showed up as a recorded volume of 10,305 cm³ against a measured volume of 6.86 L. Two records agreeing is not confirmation; it is what happens when both are fed by the same input.
What we measured
We checked one listing on our Amazon.com.au account. The catalogue record held dimensions of 30.9 × 23.0 × 14.5 cm at 0.400 kg, which works out to 10,305 cm³. The inventory-planning record showed 0.010305 m³ — identical to six decimal places. The two records matched perfectly.
Before measuring the physical pack, we looked at the supplier's carton specification (dated 2026-06-30): 72 × 47 × 52 cm holding 20 sets. That carton allows at most 8.80 L per set. A single pack recorded at 10,305 cm³ — roughly 10.305 L — cannot fit inside it. That contradiction alone flagged the catalogue figure as suspect.
On 2026-09-15 we measured the finished pack as it ships: 24 × 13 × 22 cm, 407 g, giving a real volume of 6.86 L.
| Source | Dimensions | Volume / weight |
|---|---|---|
| Catalogue record | 30.9 × 23.0 × 14.5 cm | 10,305 cm³ / 0.400 kg |
| Inventory-planning record | — | 0.010305 m³ |
| Supplier carton (20 sets) | 72 × 47 × 52 cm | max 8.80 L per set |
| Tape measurement (2026-09-15) | 24 × 13 × 22 cm | 6.86 L / 407 g |
What it means
FBA charges the larger of actual weight and volumetric weight. Amazon Australia uses a volumetric divisor of 4,000, so the recorded 10,305 cm³ produces a volumetric weight of 2.58 kg. The actual weight is 0.40 kg. Under the recorded dimensions, the billed weight is 2.58 kg, not 0.40 kg.
The practical point: if your catalogue dimensions are wrong, a second record that inherits the same figures gives you no new information. Cross-check against something outside the Amazon records — a physical tape, a scale, or a supplier specification. When the numbers disagree, the physical measurement is the one to act on.
Fee errors from incorrect dimensions compound over time. If you are already watching how dimension changes flow through to your net contribution, the margin post on how an Amazon fee increase affects margin covers that framing.
What we do not know
Correcting the dimensions in the catalogue record is the necessary first step toward requesting a re-measure by Amazon. It is not a fee change by itself. We have not stated the outcome of any re-measure request, because we do not have that result to report. The fee Amazon actually charges comes from Amazon's own measurement of the physical unit it holds, not from the catalogue attribute alone.
How to check this on your own account
- Find your product's package dimensions and weight in its catalogue record and write the figures down.
- Measure the finished pack yourself — tape and scale, packed exactly as you ship it.
- Compare the two sets of figures. If a second Amazon record matches the first, do not treat that as confirmation; it may be drawing from the same source input.
- Multiply your recorded length, width and height together, then divide by the volumetric divisor shown on Amazon's pricing page for your marketplace. Compare that result with the real weight. The larger of the two is the billed weight. If the recorded dimensions produce a volumetric weight well above the real weight, the catalogue figures are worth correcting.
FAQ
Why do two Amazon records agree when both are wrong?
When one record feeds another, the second record inherits the first record's error rather than checking against the physical item. Agreement between two records only confirms consistency of input, not accuracy. The carton specification and a tape measure are outside that loop, which is why they caught the discrepancy here.
How does a wrong package volume affect what FBA charges?
FBA bills the larger of actual weight and volumetric weight. On our listing, the recorded 10,305 cm³ produced a volumetric weight of 2.58 kg against an actual weight of 0.40 kg, so the billed weight was the volumetric figure. A correct recorded volume of 6.86 L would produce a much lower volumetric weight and bring it closer to the actual weight.
Is fixing the catalogue dimensions enough to correct the fee?
No. Correcting the catalogue record is the basis for submitting a re-measure request to Amazon, but the fee Amazon charges comes from Amazon's own physical measurement of the unit it holds. Updating the attribute is the necessary first step, not the final one.
About the data: All figures are from Avanta Global EOOD's own Amazon.com.au account, one listing. The catalogue and inventory-planning records were captured on 2026-06-30; the tape measurement and scale reading were taken on 2026-09-15. Volumes are in litres and cubic centimetres; weight in kilograms. This is not a controlled experiment, not a representative sample of any marketplace or product category, and not advice.
About this article
This article was researched and drafted with AI assistance. Before publication, it passed automated editorial review against Avanta Global EOOD's published editorial standards (factual accuracy, source attribution, voice & readability). A person on the AgentXray team read and approved it before publication. Our editorial standards page documents exactly what we check. We continuously monitor published content for accuracy and update articles when new information emerges. Learn more about our editorial process and the team behind AgentXray.
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About this article
This article was researched and drafted with AI assistance. Before publication, it passed automated editorial review against Avanta Global EOOD's published editorial standards (factual accuracy, source attribution, voice & readability). Our editorial standards page documents exactly what we check. We continuously monitor published content for accuracy and update articles when new information emerges. Learn more about our editorial process and the team behind AgentXray.