This cat ball cap says "You Had Me At Meow". The cap is made of 100% polyester. The tag on the top of the cap calls it a children's cap but we measured the inside of the cap. When the adjustable velcro back strip is set to the widest width the cap opening is 9" wide x 8" deep (front to back not including the visor). We believe this ball cap is adjustable for a child or an adult. New. Sample.