Abstract: A method of continuous non-contact outer dimensions measuring of cross sections of metallurgical rod material consists in the following technical solution: at least three laser beams rotating in the same direction or oscillating laser beams of commonly calibrated and synchronized scanners evenly surround rod material so that the centres of the beams are aimed at the axis of the rod material repeatedly measuring the distance between the beginning of the coordinate systems of scanners and the surface of the scanned rod material; then the group of simultaneously measured distances is converted to point coordinates of the common coordinate system; using the groups of the common coordinate system, diameters and centres of gravity of the cross section of the rod material in the scanning plane are calculated; based on approximation of changes of the centres of gravity of the rod material in time, at least one function of the cross movement is determined during profile scanning and using the function/s of the cross m