Before I started clinicals, I wanted to get a watch that you can clip on to your pocket, but I ended up not getting one. I regularly wore a watch, but I didn't want that particular one to be worn for clinical.
As I was shopping for a watch, I ended up finding a cute nurse Minnie Mouse watch at Wal-Mart! It has a thin, white, synthetic leather band, and on the end of the second hand, there is a heart.
For now I actually don't wear it the whole day. If there is not a clock on the wall of the patient's room, I will put it on to do vital signs, but then I will put it back in my pocket until I need it again. That way I don't have to worry about anything getting on it.