FEITONG(TM) Waterproof Children Boy Digital LED Quartz Alarm Date Sports Wrist Watch Movement: Digital, Strap Material: Silicone, Surface Material: Acrylic The whole point timekeeping Dial diameter: 37mm, Case Thickness: 15.36mm Strap width: 2.5mm, Strap Thickness: 2mm Note: This table wear in children under 9 years