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The position of the Hanbali Madhhab (and the majority of scholars) is that it is disliked and not prohibited for men to have their garment below the ankles. If it is done out of pride, then it becomes prohibited.
This was stated by Imam Ibn Qudamah (r), Imam Ibn Muflih (r), and other Imams of the Madhhab. Imam Ibn Taymiyyah (r) seemed to prefer the view that it is permissible and not disliked. But the correct opinion in the Madhhab is that it is disliked (Makruh).
[Kashaf al-Qina’ and Tashih al-Furu’]