I think that one of the questions that I get asked in all my classes is: “So, what exactly is the proper hijab?”
Well, here’s an article that describes just what the jilbaab (the outer garment worn over the clothes) should be like: “The Requirements of the Jilbab“.
It mentions proofs for each point that it makes, which is excellent.
You might say:”I asked about the hijab, not the jilbab.”
Please read the article for the answer to this question.
Also, here’s a free course on “The Conditions of the Hijab“.