List of key fee terms

Learn about key terms to help understand how fees are calculated.

Fee term	Description
Dimensional weight	Calculation of a volumetric weight of a package, using the package’s length, width, and height.
Product size tiers	Measurement categories based on the unit weight, product dimensions, and dimensional weight of the packaged item.
Product dimensions and volume	Measures the product’s size when fully packaged and ready to ship in accordance with FBA policies and requirements.
Shipping weight	Item weight plus Amazon's packaging or dunnage to deliver an order to the buyer. The shipping weight is calculated based on the item’s unit weight or dimensional weight, plus the packaging weight.
Unit weight	Measures how much your product weighs when packaged.
Fee categories	Fee categories determine which rates apply to a particular product for certain fee types. Your product’s fee category might not be the same as the category where it appears on the Amazon retail site.