Skaters may compete at the World Championships if they represent a
member nation of the
International Skating Union (ISU) and are selected by their federation. Member nations select their entries according to their own criteria. Some countries rely on the results of their national championships, while others have more varied criteria, which may include success at certain international events or specific technical requirements. All of the selected skaters must have earned the minimum
total element scores, which are determined and published each season by the ISU, during the current or immediately previous season. Member nations may enter at least one competitor or team in each discipline; while a points system allows nations to enter additional competitors or teams, up to a total of three per discipline, based on the nation's performance in that discipline at the previous World Championships. Age restrictions have changed throughout the history of the World Championships. Originally there were no age restrictions. For example,
Sonja Henie of Norway – a three-time Olympic champion and ten-time World Champion in women's singles – debuted at the World Championships in
1924 at the age of 11. However, the ISU allowed for two exceptions. Firstly, skaters younger than 15 who had already competed in senior-level international events could continue. For example,
Tara Lipinski of the United States – the
1998 Olympic champion in women's singles who debuted at the World Championships in
1996 at the age of 13 – was allowed to participate at the
1997 World Championships, where she won a gold medal at the age of 14. That exception expired naturally after a couple of seasons. Secondly, skaters who had won medals at the
World Junior Figure Skating Championships were permitted to compete as seniors at the ISU Championships. That exception lasted through the 1999–2000 season. At the
ISU Congress held in June 2022, members of the
ISU Council – the ISU's executive body responsible for determining policies – accepted a proposal to gradually increase the minimum age limit for senior competition to 17 beginning with the 2024–25 season. To avoid forcing skaters who had already competed in the senior category to return to juniors, the age limit remained unchanged during the 2022–23 season, before increasing to 16 during the 2023–24 season, and then to 17 during the 2024–25 season. == Medalists ==