According to legal definitions, what constitutes a knife as a deadly weapon?

A knife is commonly defined as a deadly weapon based on the length of the blade because this criterion directly impacts its potential to inflict serious injury or death. Legal definitions often focus on aspects that contribute to a weapon's lethality, and blade length is a measurable factor that can determine how dangerous a knife can be in a given situation. For instance, knives with longer blades are generally perceived as more capable of causing serious harm compared to those with shorter blades.

Material, color, and type of blade may influence perceptions of a knife's effectiveness or suitability for certain tasks, but they do not inherently determine whether a knife qualifies as a deadly weapon under legal definitions. Legal provisions typically emphasize blade length because it is more directly associated with the risk of injury in confrontational scenarios.