Q 3: Is it permissible for a Muslim to
sell pants and underwear to non-Muslim women?
A Muslim may sell clothing to both male and female disbelievers provided that it is modest, does not have images of crosses and is not made of silk if for men. This is because the basic principle regarding sale transactions is permissibility, unless there is evidence of impermissibility. This is regardless of whether the purchaser is a Muslim or otherwise.
May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.