Grain size analyses were performed using areometric and laser methods (with the use of Analysette 22 apparatus). Soil samples were collected from surface horizons of loess soils (Cambisols) of the Nałęczów Plateau (SE Poland). In general, the grain-size distribution data obtained with the two methods are typical for loess material: little amount of sand fraction (less than 2%), domination of silt fraction (about 65% ace. to areometric method, and 50% ace. to laser method), considerable amount of fine particles 33% and 49%, respectively), and low amount of colloidal particles (10% and about 5%, respectively). Data obtained with the two tested methods differ significantly. This conclusion argues the need for further careful studies in order to obtain better harmonisation and interpretation of grain size analysis data.