Shaykh Muhammad ibn Saalih ibn ‘Uthaymeen was also asked about the ruling on women wearing any kind of pants or trousers. He (rahimahullaah) answered:
“I think that women should not wear trousers at all, even if there is no one with her apart from her husband, because this is imitating men. The ones who wear trousers are men, and the Prophet (sallallaahu `alayhi wa sallaam) cursed women who imitate men.” [Majmoo’ Fataawaa wa Rasaa’il al-Shaykh Muhammad ibn Saalih al-‘Uthaymeen, part 12, p. 287]