There are a number of similar models, and this is my take. I use the version intended for use with a medium-sized (roughly 16x52mm sticky area) 3M Command strip, but have included models with screw holes if you really want to put holes in your wall, or need that extra sense of security.

I've noticed that some hat styles slope in such a way that they slide off of many hooks, including these, but I designed this one so you can stick a piece of soft neoprene adhesive foam (often sold as weather strip) that gives it some form-fitting grip and my bowler stays put just fine. You could also try PrusaSlicer's “fuzzy skin” option.

You can find the source for this file at onshape.