I would write the current steem price. I think the future me would get a kick out of that.
This seems like something that could be done through Shapeways. I have designed rings before, and I'm thinking I could design something similar.
(designing...)
OK. I wrote up a post showing how I came up with a similar design.
In that post is a Shapeways link for a size 11 ring. I think they have gold, platinum, bronze, silver, and metal plated, along with other materials.