Lee in Richmond

I am going through bags of sewing scraps from a lady who seemed to be sewing in the 1970s and 1980s. She died before I knew the person donating these. I found these two items (photo below) and don't recognize what they are for.

One is marked Small, the Other Medium, and both are stamped Cory Jane Originals, Indianapolis 2, IND. This might be pre-zip codes, making it before 1963. Each is 5/8" wide, and were held by [amazingly aged] rubber bands into their circular shape, but I suspect they were flat originally. They feel like they might be made of Bakelite.