Size M: Brim: 2.0 inches (5 cm), Height: 4.3 inches (11 cm), Inner Circumference: 20.9 inches (53 cm).
Size L: Brim: 2.0 inches (5 cm), Height: 4.3 inches (11 cm), Inner Circumference: 22.4 inches (57cm).
Size L: Brim: 2.0 inches (5 cm), Height: 4.7 inches (12 cm), Inner Circumference: 22.4 inches (57cm).