I'm sure this has been discussed before, but it's top of mind as I'm about to leave for an interview. I went to see what the Internet said on the topic, and I got a variety of views. Some say don't, so the interviewers don't think about you needing time off for a wedding or future baby. Others say it shows stability. Others think you may be judged for the size or expense of the ring.
Perhaps more than anything, I was surprised about how many people were asked if they were married. They thought it was lying to not wear the ring. (In the US, you should not be asked about marital status in an interview.) People from other countries say it's common to put marital status on the CV.
In the end, I've decided not to wear mine. It's not big, and they probably don't give a hoot about my marital status, but I don't want anything that could lead me to be perceived negatively.