The shape of concrete aggregate fine particles (fines), with particle sizes between 3 pm and 250 pm, produced by high-speed vertical shaft impact (VSI) crushing of 10 different rock types from quarries in Norway, has been studied by both dynamic image analysis (DIA), which is a two-dimensional (2-D) method, and X-ray computed microtomography ( CT) coupled with spherical harmonic (SH) analysis, which is a three-dimensional (3-D) method. The 3-D mu CT results serve as a check on the 2-D DIA results. The intent was to evaluate the applicability of the 2-D DIA method to extract shape parameters that could represent the actual 3-D shape of the VSI crushed concrete aggregate particles. The results show that the 2-D DIA method has problems correctly measuring the shape of particles smaller than about 40 pm due to too large of a pixel size and possibly some particle flocculation. The findings of this paper show, however, that if a large enough number of particles are analysed by the 2-D DIA method, a good but limited indication of the actual 3-D shape of the irregular crushed aggregate fines larger than 40 pm can be acquired and used for simple quality control in hard rock quarries. (C) 2016 Elsevier B.V. All rights reserved.