1. A method for digital manufacturing of a sized jewelry item comprising: forming a digital model of the sized jewelry item, the forming a digital model comprising: creating a three-dimensional digital model of a customization component by creating a toolpath based on CAD data and computing a surface of a volume that would be removed by a cutting tool following the toolpath; providing a three-dimensional digital model of a generic component by selecting a sized three-dimensional digital model of a generic component from a plurality of stock three-dimensional digital models of generic components; and combining the digital model of the customization component and the selected digital model of the generic component using a Boolean operation to form a three-dimensional digital model of the sized jewelry item; forming a sized physical model of the sized jewelry item based on the digital model of the sized jewelry item; and manufacturing the sized jewelry item in a lost wax process using the physical model.