Description:Size: Contains 6 whistles with lanyards; Size: 1.7cm/0.66in * 2.2cm/0.86in * 5cm/1.96in.Pleasant Voice: Our whistles are well crafted and have a loud voice that can quickly attract attention anytime, anywhere.Material: Made of ABS, lightweight, safe, durable, and sturdy.Application: These whistles are suitable for referees, coaches, trainers, sports, lifeguards, self-defense, survival, emergency situations, bird or dog training, etc.Free Your Hands: Each whistle has a ribbon that you can easily hanging around your neck or on the wall.Specification:Material: ABS.Color: As shown.Size:Approx.5x2.2x1.7cm/1.96x0.86x0.66 inch.Package Includes:3 options for you as bellow10PCS : 10 set of (Random)20PCS : 20 set of (Random)1 Pc : 1 set of (Random)