“The wives of the Prophet ﷺ were allowed to let their hems hang down, so they used to come to us and we would measure one forearms length for them with a reed.”
أَنَّ أَزْوَاجَ النَّبِيِّ ﷺ رُخِّصَ لَهُنَّ فِي الذَّيْلِ ذِرَاعًا فَكُنَّ يَأْتِيَنَّا فَنَذْرَعُ لَهُنَّ بِالْقَصَبِ ذِرَاعًا