Depends on how big you are vs how big he is. Even with men vs men there's a reason they have different classes for weight because it makes such a difference in a fight. I'm 5'11" and 195 lbs, I work out, have taken a few martial arts, and have been in several street fights. Now my co worker, even though he's never taken a day of martial arts in his life, could almost certainly crush me since he's 6'4 and 380 lbs, it wont matter how good I am at fighting. Weight difference is even more drastic between men and women, seeing as for the same height and weight men have twice the upper body strength as women, and seeing as men on average are 60 lbs heavier and 6 inches taller, the average man would have at least 3 times the upper body strength as an average woman.