Amazon erroneously change the dimensions or weight for your FBA products without notice. This can cause Amazon to charge you higher FBA fees for each order. Get an instant alert when any dimension or weight change result in a change in FBA fees.
If Amazon measures your product incorrectly and overcharges, you can open a case with Amazon and request a "Cubiscan" of your product to re-measure and re-weigh your product. If the findings support your position, you can request reimbursement for the overcharge.