The International Topper is a World Sailing recognised centreboard dinghy. The winners of these Championships are recognised by WS as World Champions. International Topper World Championships have been run since 1982, bianually up to 2006 and annually to present. Venues have included Wales, France, the Netherlands, Ireland, Italy, Northern Ireland, Austria, UAE, Scotland, Germany, Finland and Norway.

The International Class runs two World Championship series, the first for male and female sailors generally 13 years of age and above with an expected fleet of between 150 and 200 competitors. The second World Championship will run separately for younger sailors using the smaller 4.2m2 sail and with approximately 50 competitors.

The International Class also runs an International Masters Championship open to male and female sailors aged 21 years of age and over. This is not a recognised WS event.