Multiple bends in fibre contribute significantly to the increase in power loss in optical fibre cables. Bending losses are influenced by different optical parameters like Mode Field Diameter (MFD), Cut-off wavelength and MAC value. This paper highlights the results of a series of tests conducted, to determine the power loss of matched clad step index Single Mode Optical Fiber (SMF). The effect of MFD, Cut-off wavelength and MAC value have been studied with various macro and micro bend testing techniques. The testing techniques and relevant parameters, which effectively measure the bend sensitivity of SMF, have been identified.