A head-hugging brimless cap, with or without a visor, made from triangular sections of cloth, leather, or silk joined by a button at the crown and seamed together around the sides.
A cap that fits the head closely, usually knitted from wool.
A Beanie Baby, a small soft toy filled with beans or similar stuffing.
A felt hat with a fairly low, creased crown with a brim that can be turned up or down.