It wasnarrated that Umm Salamah said:
"The Messenger of Allah (ﷺ)wasasked about how long a woman's hem should hang down. He said: 'Ahand span.' I said: 'But then (her legs and feet) will beuncovered.'He said: 'Then a forearm's length, but no more thanthat.'" (JA)
English reference (JA): Vol. 4, Book 32, Hadith 3580 (JA)
Arabic reference (JA): Book 32, Hadith 3711 (JA)