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?
He answered:
"Yes, the trousers which resemble the trousers 
of the disbelievers is Haraam ((Whoever imitates a people he is from them))[1] 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"
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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:
Mussasah sumaa.