Let me tell you more abou the details.When you get it, you will it looks like a foursquare knitted hat,but when you put it on your hat, you can find it looks more spatial and just like exactly a cute cat at the picture I shown to you. And the height of the hat is 20cm,and the width is 20cm when laid flat.Additon, the width is extensible because of stretchy woollen knitting yarn.The maximum of width is 30cm when expanded.