Here's the Apple Watch (42mm version) - not sure if I will purchase one - I will say that no matter what, the sport band feels very comfortable and the watch feels great. Also, the band can be changed out to third-party bands easily. The 38mm sized version is just too small for me, but should fit children or people that have small wrists with no problem.
Here's the demo version (42mm version) on my wrist:
Apple Watch - Sport Band version
Apple Watch - Stainless Steel Band version
With magnetic closure