Amyove Synoke Kids Girls School Boy Waterproof LED Digital Date Stopwatch Wristwatches Red Wrist circumference: 145mm-200mm Watch Case Diameter: 43mm 50m Waterproof, no need to take off while swimming (avoid warm/hot water) Detachable watch dial, exchange the watch band if you buy 2 or more 50m Waterproof, no need to take off while swimming (avoid warm/hot water)