There are many international brands which cater to both the genders - like Giordano, Marks & Spencer, Ralph Lauren, Calvin Klein. Then there are some women-oriented brands too like Ann Taylor, JC Penny, Nike Women, etc.
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Yes there are plenty branded clothes for Indian women in the market - For formal Pantaloon or Westwise even Wills Lifestyle are good, even Van Heusen has come up with very good collectiosn for women. Apart from that are there many branded or designed lines from many fashion gurus.