Potato, wheat and corn starches were segregated to big and small granules through the water sedimentation method. The obtained fractions were then analysed in accordance to porosity, real surface, volume of pores and their average diameter as well as content of total phosphorus, crude protein, amylose, water binding capacity and water solubility, as compared to the initial starches. Results suggest that small granules fractions are characterised by the biggest real surface, volume of pores and their average diameter. Fractions of big granules, from the all examined starches, showed bigger values of real surface and volume of pores in comparison to the initial starches. Differences in the average diameter of pores suggest the existence of various shapes of pores in the analysed starches. Additionally, it was observed that fractions of small starch granules were characterised by bigger content of total phosphorus, crude protein and amylose as well as lower capability of swelling and solubility in water than big starch granules.