Diameters of kikar (babul) trees were measured at 6 inches (15 cm) interval from ground level up to breast height 4.5 feet (1.37 meters). Each set of diameters exhibited a strong linear correlation with diameter breast height. Separate straight line regression equations were developed using sets of diameters at different heights as independent variables and diameter breast height as dependent variable. Estimations of diameter breast height were done from these equations against diameters ranging from 0.5 to 40 inches (1 cm to 100cm at different heights along the stem from ground level up to 4 feet (1.22 meters).