“Six ken” in Japanese

Six ken in Japanese is “反” (tan). Full meaning: variable measure of fabric (28.8 cm in width), for kimonos: at least 10 m in length, for haori: at least 7.27 m in length, for other clothes: at least 6.06 m in length; 300 tsubo (991.74 meters square, 0.24506 acres); six ken (10.91 m).