I've been hunting for shoe trees for WOMEN for SMALL shoe sizes and had come to the conclusion that we aren't supposed to want shoe trees--all of the stores stock men's sizes, but not women's.  Found these and they are perfect-no rough edges, no exposed nails, the spring action is smooth so you're not damaging your shoe trying to get it in and I really like the way the split on the front works expanding to fit the width.  Planning to get some for a gift and more for me now that I"ve found them.