Males have significantly longer index and ring finger length than females. Sex differences in the length of ring finger are larger than index finger. Again Males show significantly lower mean 2D:4D digit ratio (0.968) as compared to females (1.014). With respect to handedness sex differences were found slightly higher for right hand than left hand. The study suggests that ratio below and equal to 0.99 is suggestive of male sex for both hands, while a ratio of more than 0.99 is suggestive female sex for both the hands. This cut-off accurately determines 93% males and 90% females for right hand and 87% males and 84% females for left hand. The study shows precisely very large sex effect with d values = −1.81(right hand), thus 2D:4D proves to be appropriate for sex determination in medicolegal investigations. -- https://www.sciencedirect.com/science/article/pii/S2090536X16300673