Mũ Đinh Tự (), also known as mũ chữ đinh, mũ Nhục, is a type of hat with the shape of the letter Đinh (丁) was a type of hat worn in Vietnam by civil and military officers in the Lê dynasty and fell out of favor in the 19th century. Nowadays it can still be seen at local festivals.
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See also List of hat styles Ba tầm Phốc Đầu
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