It is narrated from Sayyiduna Ibn Umar (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) permitted women to raise their garment by one handspan. They said, "In that case, our feet will become visible?" The Noble Prophet (peace and blessings be upon him) said: "Do not add more than one handspan (this much is excused)."
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 4773
Hadith Gradingحکم دارالسلام:صحيح بطرقه، وهذا إسناد ضعيف لضعف العمري