The 5.5 Metre World Championship are international sailing regatta in the 5.5 Metre class organized by the host club and the International 5.5 Metre Class Association and recognized by the World Sailing.[1]
The most titles have been won by Norwegian sailor Kristian Nergaard, with eleven titles between 1990 and 2020 and another six silver medals. The second most titles have been won by Swiss sailor Flavio Marazzi and Swedish sailor Johan Barne, both with six.
The 5.5 Metre was an Olympic class from 1952 to 1968.[2][3]