The Awrah of the Women When it Comes to her Mahrams
Question:
What is the extent of the awrah of a woman with her maternal uncles, paternal uncles and her brothers, in the house?
Answer:
She is allowed to show to her Mahrams: her face, head, neck, hands, arms, feet, shanks (the part of the lower limb between the knee and the ankle), and she should cover everything else other then that.
Shaykh Muhammad bin Saalih al-`Uthaymeen
Hijab Marya wa zinatuqa, page 43
Translated by Muhammad Elmi