This is an ear saver to alleviate soar ears. I have tried several version of ear savers and kept coming back to this style of ear saver with a smooth back. There is a plain version and version that says FedEx on it. Each is .6mm tall in the z direction. I'd recommend to print at .2mm layer height making it 3 layers. The total length is roughly 182mm. It is 17mm wide.