Unlike the traditional manner of wearing the katana, the tachi was worn hung from the belt with the cutting-edge down, and was usually used by cavalry. Deviations from the average length of tachi have the prefixes ko- for "short" and ō- for "great or large" attached. For instance, tachi that were shōtō and closer in size to a wakizashi were called kodachi. The longest tachi (considered a 15th century ōdachi) in existence is more than 3.7 meters in total length (2.2m blade) but believed to be ceremonial. In the year 1600, many old tachi were cut down into katana.