Introduction: Need of minimum length and diameter of graft for Anterior Cruciate Ligament (ACL) reconstruction and possible predictability with anthropometric parameters. Semitendinosus as solitary tendon is the preferred choice among all the grafts in recent years. Quadrupled tendon graft requires certain length of the tendon. Pre- operative assessment of graft size helps in planning of procedure. Materials and Method: In this prospective study 68 (57 Male and 11 Female) patients undergoing ACL reconstruction using hamstring tendons were included. All the anthropometric parameters like height, weight, age, sex, BMI were recorded preoperatively. Intra operatively tendon length and its quadrupled (by folding the tendon on itself) diameter is measured. Results: Average length of tendon was 27 cm and quadrupled diameter 7 mm. Semitendinosus tendon length was adequate in 52% of patients in our study. In female patients only 18% had adequate tendon length. Quadrupled diameter was adequate (7 mm or more) in all the patients. This Indicates that tendon length has no relation to diameter. Height is the only parameter indicative of tendon length in both sexes. Weight/BMI were moderate indicator of thickness or diameter in both the sexes. In our study all those of the height 170 cm or more had adequate tendon length and diameter. Discussion: Semitendinosus tendon length is predictable as the study shows strong relation to height of the individual. Similar observations made in other studies on Indian population. Diameter or the thickness is moderately related to BMI. Thickness of tendon in our local population is adequate.