I bought this for my wife's Moto 360 Smartwatch, 42mm by 16mm width. My wife's wrists are pretty average, and even on the smallest setting, the watch is pretty loose. Therefore, the health monitoring function does not work and it is uncomfortable to wear when it is dangling from the wrist. For $20 you would expect an additional strap for smaller wrists. I will only return the group as there is no point in being too big.
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