I've actually tried these on heeled shoes (wedge espadrille sandals) and they work wonderfully! I am trying to get ready for the warm weather to come in and it helps to be able to walk in my new sandals.

After wearing my shoes around the house a few times, I realized that I would really need to stretch the shoes out a bit so I popped these into the sandals and overnight, they were looser than they were before. Then when I tried them on, they fit perfectly.

I know they make these shoe stretchers for heeled shoes but since I was able to use these in heels with success, I am prevented from having to purchase a separate pair just for the heels. Now, I can widen and stretch all of my shoes...heels or flats.