The defining characteristic of the metal counter stools is the material from which they are made. Whether constructed from iron, aluminum or steel, metal counter bar stools have metal, wood or upholstered seats. Metal counter height bar stools have seats that are generally 23.75 inches up to 28 inches high. That is, the seat height of a metal kitchen bar stool is from 23.75 inches up to 28 inches from the floor to the stool's seat. This standard height is known as counter height.