I was planning on only buying my boyfriend a promise ring for Christmas — but not one for me as well so if he wants, he can get my one later on. Is there a specific type of ring/metal that turns a finger green because I don't want to spend too much on a ring, because I also have other gifts to pick out for him, but I don't want it to seem cheap. Also, I HAVE NO IDEA WHAT HIS RING SIZE IS! He has large hands and I can't ask without giving something away. He might think I'm proposing if I ask haha. Any suggestions or general ideas of the typical ring size for a guy? Thanks everyone!
Although, we have discussed marriage in our far future so this idea isn't too pushy. Do you think this is a good idea?