Nowadays safety of women is becoming a major issue. daily we hear news about sexual harassment on girls. you never know how the people around you are, it is always better to prepare yourself for any such circumstances. today many classes(institutes) are there that teach you about self defence. many things are available on the internet and in the shops among which some are listed below:- 1. Personal safety alarm 2. Self defense knife 3. plastic knuckles for your shoes 3. Stun gun 4. Pepper Spray. the most important thing is that if you see any such incident happening around you primarily try to save or help the victim Aand if not possible just call for help or ask people for help.