Thanks so much for all the feedback!! It has been really helpful.
I've been back and forth quite a bit, but I think I've decided on right ring finger.
An extra bonus to this is that I will be able to wear it in place of my e-ring if I become pregnant again. The amount my left ring finger increased is the same size my right finger is normally, haha.
But what it really comes down to is that I think you guys are right. This is more of a classic style and it would probably look best on the ring finger.
Thanks again for all your help! Sooo excited to get this piece!