Adjustable ring size device is a great solution for fingers with knuckle problem, and these ring spacers fit most rings. These ring size adjusters and the ring fitter will not come off whenever you take off the ring. It can reduce ring size 1- 1.5 size. And it is made of TPU, ring resizers are so comfortable that you even don't feel its existence. It is a great gift for your lover, family and friends.