Novelty Hats for Adults - Derby Bowler Hat - Mouse Ears - by Funny Party Hats This Mouse Inspired Derby Hat Makes a Bold Statement This Hat Features a Cute Polka Dot Bow and a Polka Dot Ribbon Going Around The Crown of the Hat This Cute Light Blue Bowler Felt Hat with Polka Dotted Trim is Fun for Any Occasion This Adult Sized Hat has a 6.5" Inner CircumferenceThis Adorable Bowler with Mouse Ears is a Great Addition to Any Costume This Adult Sized Hat has a 6.5" Inner Diameter This Adorable Bowler with Mouse Ears is a Great Addition to Any Costume