My daughter's college encourages students to decorate their mortar boards at graduation. So much effort goes into these that it's a shame not to display them afterwards. So I wanted a mount that was adjustable for caps of different sizes (in case there's variation) and allows for decorated caps to have a bit of overhanging material. The ratchets on this allow for that.

Put a command strip on the larger piece (velcro version so it can be peeled off when the hat's on it) and stick it on the wall.

If printed vertically - no supports are needed.