Is it permissible for a Muslim woman residing in a non-Muslim country to wear long trousers that reach her ankles and a shirt that reaches her thighs or knees, and what are the limits of what she may and may not wear when studying or going out in such a country?

The garment of the Muslim woman has specifications that must be met. If these conditions are met, she is permitted to wear it; otherwise, she is not. There is no difference in this regard whether she is in a Muslim country or a non-Muslim country. It is not a condition for this garment to have a specific shape or a specific color; rather, the intention is to achieve modesty and eliminate the causes of fitna.