What is the ruling on women wearing pajamas at home, with the description mentioned? Is it a condition that the blouse reaches the middle or end of the thigh?

What is required for a woman's clothing is that it be loose, not describing the parts of her body. If it does not cover what must be covered in front of mahrams or other women like her, then it is not permissible for her to appear before them in it, unless she wears something over it that covers that part.