A type of collar is a type of clothing item that encircles the neck. The most common types of collars are Eton, FLEA, Crewneck, and Buster Brown. An Eton collar is a stiff, high-standing collar with a narrow opening at the front. A FLEA collar is a type of collar that is made from a thin strip of fabric that is tied in a bow around the neck. A Crewneck collar is a round neckline that is close-fitting and sits at the base of the neck. Finally, a Buster Brown collar is a type of collar that is made from a wide band of fabric that is folded over and fastened at the back of the neck.