Diameters of shisham 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 had a strong linear correlation with diameter breast height. Separate straight line regression equations were developed using sets of diameters of different heights as independent variables and diameter breast height as dependent variable. Estimations of diameter breast height were doe from these equations against diameters ranging from (1 cm to 100 cm) at different height along the stem from ground level up to 4 feet (1.22 meters).