The purpose of this study was to measure and compare the slot dimensions & inbuilt torque of 0.022″ × 0.028″ slot passive self-ligating brackets of five different manufacturers. Material and method: 200 brackets from five different manufacturers were taken for evaluation of slot dimensions with a stereomicroscope (alco 0745t range/capacity- 10x -450x) The images obtained were calibrated with a software quickphoto micro 3.2. The bracket slot at the base and the face were measured. Results: All the bracket slots measured in this study were found to be oversized compared to the standard value (0.022”). Slot dimension at base and at face were found to be coinciding except in group 3(Ortho Organizer) where the mean value at face was found to be higher than at base, indicating divergence in slot profile. The mean values for built in torque were less in all the brackets. The maximum variation in built in torque was seen in group 5 (Modern Orthodontics) (24%) & the least variation in group 2 (Ormco) (1%)