Sunan An-Nasa'i

It was narrated from Umm Salamah that:When the Prophet [SAW] said what he said about the Izar, Umm Salamah said: ""What about women?"" He said: ""Let it down a hand span."" She said: ""But then their feet will show."" He said: ""Then (let it down) a forearm's length, but no more than that