Scaling a brush down by 10

Hello there,

This is probably a very basic question, but I’ve been struggling with it for a couple of hours. I expanded one of my brushes once with the “10” scale in order to do some edge beveling. Now that I’ve done my beveling, I’d like to return it to its original size. However, when I try to scale it down one notch with the 10, it disappears. What would be the process for reducing an object to 1/10th its original size, OR what could I do to return my object to its original size?

Any help would be greatly appreciated.