A visible number on the uniform bottom must match what?

The requirement for a player's uniform is that the number displayed on the bottom matches the number on the uniform top. This consistency is crucial for officiating purposes, as it allows officials, scorekeepers, and spectators to accurately identify players during the match. The uniform number serves as a key identifier that aids in tracking individual player actions, such as substitutions, faults, and scoring.

Having matching numbers helps maintain the integrity of the game, ensuring clear communication and minimizing confusion on the court. This is especially important in volleyball, where continuous play and quick substitutions are common. Uniform standards set forth by volleyball governing bodies emphasize the importance of uniform identification, which is why the coordination of numbers between different parts of the uniform is mandated.