How to tell people off who like to critisize others???

There are some people who like to critisize others.Particularly,I have few females around me criticize me what I wear which irritates me and they do not have any fashion sense in my opinion(they wear cheap bad quality clothes & think they are very fashionable). In otherhand I often get compliments from men that they like what I wear. I noticed some women thinks wearing something reveals skin or following what others are wearing are very fashionable. I like to wear cly & elegant clothes and I dont wear somethind that reaveal my skin too much & I am not comfortable with it. I used to wear something shows my body line when I was skinny but since I gained weight I dont wear it much cuz it will emphasize my fat. In my opinion, fashion should be something that compliment your looks not following trends always or wearing something skimpy. Anybody, who have same experience, please tell me how do you answer to those people who critisize you everytime. How to shut their mouth???