For determining dimensional properties of a measured object, which has a plurality of geometrical elements (46, 48, 50, 52), a database (34) is provided, which contains a plurality of predefined measurement elements (36) and a plurality of typical test characteristics (38) for the predefined measurement elements (36). Each typical test characteristic represents a defined dimensional property of at least one predefined measurement element. In addition, a visual display (32) of the measured object is made available, which shows at least one first geometrical element (46). The operator can select the first geometrical element (46) on the basis of the visual display (32). Test characteristics (56) suitable for the selected first geometrical element (46') are then displayed. In this way, the suitable test characteristics (56) from the plurality of typical test characteristics (38) in the database (34) are determined, in that the selected first geometrical element (46') is associated with a typical predefined measurement element. The operator can select a displayed suitable test characteristic (56). A defined measurement procedure (40) is created according to the selected test characteristic (56'). Individual measurement values on the first geometrical element (46) are then recorded according to the defined measurement procedure (40). A numerical value is defined according to the individual measurement values, which represents a dimensional property of the first geometrical element (46), which corresponds to the selected test characteristic (56').