The weigh-in process works differently in professional boxing and amateur boxing. In professional boxing, for title fights, the International Boxing Federation (IBF) mandates a weigh-in the day before a fight and then a follow-up weigh-in the morning of the fight. The day before the fight is considered the “official” weigh-in. The second weigh-in is a check and boxers must not weigh more than 10 pounds above their defined weight class limit.
In amateur boxing, competitors get only one chance to make weight. The weigh-in for fighters takes place within 24 hours before a bout.