How big does a yellow boxfish get?

The yellow boxfish (Ostracion cubicus) typically grows to about 10 to 12 inches (25 to 30 centimeters) in length. However, some individuals may reach up to 14 inches (35 centimeters) under optimal conditions. They are characterized by their distinctive cube-like shape and bright yellow coloration, which can serve as a warning to predators about their toxicity.