
I'm a man with small wrists (17 cm or 6 and 7/8 inches in circumference) and the small size of these straps is barely enough, maybe 1 cm more but it enough and they stay tight! I've seen some previous reviews that said the "Keeper" loops were missing a grommet to secure at the end of the strap, but they must have fixed that as mine is fully grommed and perfectly in place remains. I have previously tried a very similar design from another brand and it was made from slightly thicker and nicer silicone which was slightly more comfortable. But honestly the difference isn't enough for me to deduct a star or so, the connector it connects to the Charge 2 device looks like many others, with a flawed design, so I had to buy several replacements, but they fit firmer than others so they state it's a bit difficult to change the straps but if that means they don't break very easily if I catch my Fitbit on the door frame then I'm fine.

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