The Ruling on Wearing Trousers
It was asked to the Noble Shaykh, Allaamah Rabee ibn Haadee Al-Madkhalee, may Allah preserve him:
"You have warned, may Allah preserve you, against imitating the disbelievers and mentioned wearing trousers. Because of this, a lot of brothers have asked, is it Haraam?
"Yes, the trousers which resemble the trousers of the disbelievers is Haraam ((Whoever imitates a people he is from them)) I have seen in some of the Arab countries that you see a woman which cannot be differentiated Christian from Muslim in the shamelessness of her dress code. And you see a Muslim, a Christian, a Jew and a Communist. You see one of them clean shaven his beard, head uncovered, wears a neck tie and he says to you 'I am a Muslim'!
And the woman dresses shamelessly possibly more than the Jews or Christians and you cannot recognize her (as a Muslimah) until it is said to you "this is a Muslim" and "this is a Muslimah"!
But as for her appearance and her dress it is not possible for you to recognize her (as a Muslimah), what do you say about this, Haraam or Halaal?
"Fataawa Fadheelatu Ash-Shaykh Rabee Al-Madkhalee, Vol.2, Page. 455"
Shaykh Saalih al-Fawzaan,may Allaah preserve him, said:
It is not permissible to wear tight clothes which show the limbs and the shape of a woman’s body. Tight clothes are not permissible for men or women, but it is especially forbidden for women, because the fitnah in their case is greater.
Al-Muntaqa min Fataawa al-Shaykh Saalih al-Fawzaan, 3/454
as Shaykh Albaani, may Allaah have mercy upon him, said:
(As) for Wearing pantaloon ( tight trousers) then we have spoken about it numerously, it is a foreign type of clothing. It is not permissible for a Muslim to wear it … ( rather ) wearing it in the prayer is more deserving to be rebuked due it showing the shape of the major a'wrah and the minor a'wrah, it shows the shape of the private parts and it shows the shape of the thighs. In reality those who are afflicted with the clothing pantaloon should bring to attention to themselves that is appropriate they be like the women , (by praying in the back
of the congregation prayer) The best of the rows of the Women is last of it.
The Reference: al Haawee min Fatawaa As Shaykh Albaani , page:335, print: