My three children wear them. They fit the device well and can tighten less than the non-adjustable straps our watch came with (they fit my little 6 year old with a smaller buttonhole and also my 11 year old). My two minor complaints are that the little band that's supposed to hold the back of the watch on your wrist keeps slipping off, causing the back of the watch to stick out (and all watches are more likely to fall off on active kids). And finally, while the material they're made of doesn't bother my kids at all, as an outsider I HATE it. It's a "sticky" (not really sticky, but grippy) type of silicone that constantly sticks to my hair or "pinches" on my hands when my kids hug me or just being around me. Bad feeling. They work well but I will not buy them again for these two reasons.
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