Ring magnets are flat (the diameter exceeds the thickness), circular in shape and have a hole in the center.

Ring magnets are used in a variety of applications, from science experiments to medical equipment, because of the versatility of their shape and their ability to work with other components, like rods or tubes. Ring magnets have a unique polarization because the north and south poles can be segmented in a variety of ways, but always alternate around the ring. This means the poles can be in half, quarter, or even eighths.