Is it permissible for a woman to wear in front of her mahrams (father, mother, and brother) a half-sleeve shirt that extends above the elbow or a quarter-sleeve shirt? And is she required to cover her entire arm after finishing work or in front of them?

A woman must cover her body in front of her mahram relatives, except for what usually appears from the extremities like the head, arms, and feet. As for in front of other women, she must cover what is between the navel and the knee. It is not required for the clothing to be loose, but it should not be tight in a way that causes fitna. One should avoid excessive questioning and intricate details in such matters.