I'm a watchmaker, so this stopper was purchased to use as a case cushion for working on watches, not as a stopper. It works great--a good size and very stable, I use it upside down, like a little circular pyramid. I'm always looking for new, better and less expensive ways to do things in watchmaking. This $4 stopper is an alternative to a similar rubber case cushion that costs $45 !!! Another win!