Peace be upon you. The criteria for an Islamic hijab are as follows: 1. It should cover the entire body (except for the face and hands up to the wrists). 2. It should cover everything that is considered adornment (even on the face and hands up to the wrists). 3. It should not attract the attention of non-mahram individuals. 4. It should not reveal the body's charms in a way that incites desire or leads to corruption. 5. It should not be something that people point at. 6. It should not be clothing specific to men. The determination of these criteria varies according to customs and countries, and thus it is the responsibility of the individual to assess this. According to Ayatollah Khamenei, the best Islamic hijab for women is the abaya. According to Ayatollah Sistani, a woman must cover her entire body except for the face and hands, provided that the clothing is not decorative in terms of color and design, and is not tight to the point of revealing the body's charms. The assessment of this also varies according to customs and countries, and thus it is the responsibility of the individual to determine it. May you be successful in all good.