Here we have the 42MM displayed. This watch also comes in the 38mm size as well. This watch fits 140–210mm wrists. Silver or space gray anodized aluminum case. Ion-X glass. Retina display with Force Touch. Composite back. Sport Band with stainless steel pin. Digital Crown. Heart rate sensor, accelerometer, and gyroscope. Ambient light sensor. Speaker and microphone. Wi-Fi (802.11b/g/n 2.4GHz). Bluetooth 4.0. Up to 18 hours of battery life*. Water resistant**. You must try on this Apple watch Sport right now with ViewTry.com.