Your shipment will be weighed in two ways: the actual weight in kilograms and the volumetric weight, which is calculated based on the dimensions of your package (L x W x H in cm / 4,000).
The higher of the two determines the rate for your shipment. For shipping a large box of feathers, we look at the volumetric weight. A small box of bolts and nuts? Then we take the actual weight in kilograms.