To be a shoe model you need to be a size six. There really is a demand for this type of thing.
But it doesn't just come down to size. Shoe modeling also involves having the right foot fit.
Yesterday I went to a casting for a shoe company and my foot fit the size six shoe, but my foot was too narrow. The shoe was meant for a wider size six.
So don't get discouraged if you foot doesn't pass the test!
Every shoe brand needs a different foot and has a different fit.
Kind of like shopping for shoes, not all size six fit the same.
If you want to shoe model you should also consider print modeling as well.