Here's The Apple Watch Sizing Guide
March 9, 2015
Along with Band pricing and battery life, Apple has also released its official Apple Watch Sizing Guide, created to help you pick the most ideal Apple Watch build depending on your particular wrist circumference.
While most of these Bands will be available separately, it’s helpful to know which ones will fit properly. For example, the Modern Buckle may not fit some men if their wrists are larger than 180mm around. This is clearly Apple’s way of suggesting that this particular option is mostly geared towards women.
You can check all of the Band sizing below (full size PDF here):
