Abstract: A checking system (4) for checking dimensional and/or geometric features of a workpiece (W) comprises a support and locating element (30), a feeler (50) for touching the workpiece, an arm (42) supporting the feeler and movable with respect to the support and locating element, and a transducer device (14) to detect the position of a checking surface (41) of the arm with respect to the support and locating element and generate signals indicative of the features to be checked. At least one of the support and locating element and the arm is made of a material having density not higher than 1.6 g/cm3 and tensile strength not lower than 1.3 GPa. A procedure for manufacturing such checking system comprises the steps of obtaining a plurality of flat elements from a sheet of material having the aforementioned characteristics, and connecting the flat elements to obtain box-like structures that define at least one of the support and locating element and the arm.