volumetric dimensions refer to the measurements used to calculate the volume of an object for shipping purposes. Volumetric dimensions are important for determining the dimensional weight, which can affect shipping costs. This is particularly relevant when shipping lightweight but bulky items. Shipping carriers like UPS, FedEx, and DHL use volumetric dimensions to charge based on the space a package occupies rather than just its weight. Understanding how to calculate and apply volumetric dimensions is crucial for e-commerce businesses to avoid overpaying for shipping.