I ordered the men’s size small as they weren’t offering XS on the sales. These are the tightest of tight fit for my size 9 rounded toe shoes. It is possible some stretching will occur, but I am happy with them. They do not fit any of my pointed toe shoes and I would not advise buying a small if your shoes are any smaller than a 9.
Formerly, Nordstrom provided a much more elegant shoe tree. Namely, a bold oval brass knob was ensconced on the heel portion. Also, sizing was more specific, meaning if one wears size 11, there was a corresponding shoe tree sized the same.