The studies of the influence of the size reduction method on the physical properties of ground barley were conducted using four particle size fractions in the range 100 < x < 315 µm. The elongation and the fractal dimension were determined to characterise the particle form. For the fraction 100 < x < 160 µm, the influence of the small particle size prevails in the physical properties examined. In this range it is to be assumed that the ratio of adhesive forces to weight forces is higher than in the case of the larger particle fractions.