8Years Sport Child Digital Wrist Watches Waterproof Outdoor with Alarm Stopwatch (1/100 seconds) Water Resistant to 30 metres (not for diving and do not press button under water). The whole point timekeeping And Alarm Clock function Durable and Lightweight Case the size of the watchcase 37.0mm x41.0mm(1 4/8" x1 5/8") the size of face dia: 25.5mm(1")