Questions about adidas Sports bracelet

then rather the sport bracelet for 8+

I don't have it there to measure, but it will hardly hold, it always slips down the arm. It's certainly too short for the leg.

Unfortunately no, is only for adidas SP Sport Armband for iPhone 6/6s/7 black

According to our information, this wristband is not compatible with the iPhone X.

There are 3 holes at the bottom, 2 on each speaker outpout and 1 on the lightning connector.