Ahem, dearhearts and gentlepeople, the Midi-Ring is not a thing. It may be a trend to wear a smaller ring that does not quite sit as far down your finger as it should, but it is just that-a smaller ring that does not fit far down your finger.
I have no opinion as to the aesthetics of this look, but it does not require a special purchase of a ring made to not fit properly. We all have those in our collections-we call them pinky rings even if they did once fit (pre-childbirth) on the ring finger. So shove one of those on your fat little fingers and call it a day. There, I just saved you at least fifty bucks. You're welcome.
We're living Idiocracy. Yes, we really are.