Bests & Worsts Reviews from Amazon

The band is very high quality, and stays put. It is extremely comfortable, and I don't even notice I am wearing it. The clasp is such that there is no chance of pinching, or catching on clothing. I will warn you- if your wrist is over 6 1/2 inches, I would go up to the large. There is no worry about the problem of having too much extra band like you would with a traditional watch band. Why? The band loops on one end and then comes back and lays flat to magnetically lock it in place. (see photos) Therefore, if you get the small, you will have a tough time- 1) squeezing it over your wrist to get it off for showers 2) the larger size is easier to work with when attaching the charger. I think it is quite safe to add one inch to your wrist size and follow my amended sizing chart (accounts for knuckles). You can't really go wrong, as you can see from the photo, you will just get a bit more overlap. Example: My wrist measures 7". The small is 5.1" to 8.7". 8.7" is the absolute largest this band can be... which means you could never get it over your knuckles to put on your wrist if you have a wrist that is much larger then 7.25". It is a tight fit getting it on and off. Therefore, if you wrist is larger than 6.75", I suggest you go to the large. I am going to order the large, which is 6.3" to 9.8". The realistic measurement should be as follows: Small 5.25" - 6.5" Large 6.5" - 9"