Stocking hangar
We don't have a mantle, so my wife asked me to make these to hang our christmas stockings from a bar we have. They each have an emblem picked by our family members. They have a 17mm gap, but are easily customizable to fit your needs.
This thing was made with Tinkercad. Edit it online https://www.tinkercad.com/things/0F1KXIkIkQJ