3d printed in black PLA plastic. 3.5” circle ears with 2 magnets in each ear. 2” curved magnet hat clip with 2 magnets per. The clips attach to the holes in your hat so ear location stays in place even after removing the ears for a ride. Fit onto most types of hats. (Even if they don’t have holes to keep the clips in place. They still magnetically hold onto most hats) Comes with 2 ears, 2 clips.