Our secretary left a note on this one that says: "firelord Ozai from Avatar the last airbender would like this" and I'm willing to leave it at that.
These crowns are flexible. Will fit pretty much all adult heads. They stay on quite well just by their own natural springiness, but we've also drilled holes at the end, just in case you want a ribbon or pins or other extra security (highly recommended if you will be upside down at any point while wearing them). Not intended as a toy for children- just as a toy for adults who may or may not be grown up. Your call.