The "Whistle" is available for competition and disaster preparedness. Size: Whistle body: 2.0 inches (5 cm); Ring + Carabiner: 3.0 inches (7.5 cm); String: 20.5 inches (52 cm); Package size: Approx. 3.3 x 6.1 x 0.8 inches (8.3 x 15.4 x 2 cm); Material: Metal (brass nickel plated).