100% Sinamay, 3 layers sinamay, Stronger, lighter and comfortable Unique Oval shape Brim measures 45cm( 17.5") side to side, 38cm ( 15") from front to back, with a crown height of 11cm(4.5") Inside circumference is 58cm.(23") There is a tie on the inside of the hat that helps adjust the size from large to small. High Quality Yellow/blue hat wide brim hat, Kate Middleton Hat, Women's Tea Party , Queen Plate Hat, Kentucky Derby hat, Wedding, Millinery, Cocktail, Formal dressy hat Would be...