the Fatwa Department Research Committee - chaired by Sheikh `Abd al-Wahhâb al-Turayrî
You are correct that wearing clothes above the ankles is required for men only. Women must wear clothes that cover their form and those clothes may very well go below her ankles or even touch the ground.
It does not matter what particular style of dress you adopt, as long as you are covered properly. However, the clothing must be thick enough not to show the color of your skin and it must be loose enough to completely conceal your form. The means of covering is not important. Any clothes that fulfill the conditions of covering may be worn inside or outside the house. Different cultures have different customs in this regard, and those customs may be respected as long as the woman is properly covered. If you are wearing wide pants and your shirt covers you completely down to the bottom of your thighs, then this should be sufficient.
And Allah knows best.
Source: Islam Today