Current, sex determination from human bones can be performed in various methods. Forensic scientists were searched in physical characteristics of bones for sex determination. In forensic cause works, frequent bones in the sex determination are pelvic bones and skull, respectively. Moreover, in the forensic causes possess variety factors that might be changed such as slaughtering or burning of the body that destroyed bones incompletely. Therefore, this study aims to reliability presentation that determinate in sex using ulna and tibia measurements.

In this study was measured ulna and tibia length in total 400 people (188 men and 212 women). The experiment groups contain age between 20-55 years old. The tibia lengths were measured from the top of medial malleolus to the top of medial condyle of tibia. The ulna lengths were measured from the top ulna styloid process to olecranon process. All measurements were completed with Vernier caliper (20 inch)

Sex and bone length data were performed with statistical analysis. This results demonstrate that accurate result for man determination is ulna left; 84.00%. In women determination that show the accurate result in ulna right; 87.30%.