I used to just have one belt, but then I saw 2 more I liked and needed something to hang them with.
I had done a search on thingiverse for a belt hanger, but forgot how similar a belt hanger is to a tie hanger... While the thing was printing i realized that there may have already been a tie hanger, and turns out there is. This looks very similar to thingiverse.com/thing:922, but was independently designed.
The top gap is wider, for a spiked belt as shown in the picture.