In the modern classification, it indicates the one with its blade length (direct distance between Kissaki (tip) and Mune-machi - notch in the back) is 60cm and longer, and those shorter than 60cm is called Wakizashi.
現代の分類では、刃長（切っ先から棟区までの直線距離）60cm以上のものを指し、60cm未満のものは脇差と呼ぶ。