Surah an-Nur verse 31
'And say to the faithful women to lower their gazes, and to guard their private parts, and not to display their beauty except what is apparent of it, and to extend their headcoverings to cover their bosoms, and not to display their beauty except to their husbands, or their fathers, or their husband's fathers, or their sons, or their husband's sons, or their brothers, or their brothers' sons, or their sisters' sons, or their womenfolk, or what their right hands rule, or the followers from the men who do not feel sexual desire, or the small children to whom the nakedness of women is not apparent, and not to strike their feet so as to make known what they hide of their adornments. And turn in repentance to God together, O you the faithful, in order that you are successful.'
And in hadith;
Narrated Aisha, Ummul Mu'minin: Asma bint Abu Bakr, entered upon the Apostle of Allah while she was wearing thin clothes. The Apostle of Allah turned his attention from her. He said: O Asma', when a woman reaches the age of menstruation, it does not suit her that she displays her parts of body except this and this, and he pointed to her face and hands
For myself that means I cover my arms to my wrists and my legs below the ankles to my feet. I also
choose to cover my face. Some argue this is compulsory, some not. I choose to because my face is for my husband and family; nobody else.
Hope this helps sister