I was happy that he hat did adjust with an elastic band around the head and my 3 year old could wear the hat with a good fit. However an adult could fit the hat to when the elastic is adjusted. When the hat is adjusted for a young child it looks mad hatterish as the top of the hat is still adult size. I did not realize from the photo how oversized the top of the hat would be. Great trick and easy for the kids to do. I would still recommend. Material is a shiny velour (thin velvet) type material.