This is a new Chicago Bulls "Windy City" Girl's Snapback Hat by New Era.  The size is adjustable with a plastic band, and the colors are black and pink.  This rare hat shows some signs of storage/age, mainly the underside of the brim, but it is new/unused and still has the New Era sticker on the brim. 

Please see the photos for detailed views. I welcome any questions, and thank you for looking and possibly buying.