If you have a slender heel, these will not work for you. I tried my normal size, then tried sizing down and even with my toes practically hanging off the front, the back strap immediately began to fall down. (This has never been an issue for me before.) I had this problem with the Sketchers Beverlee High Tea Wedges too, which is super sad because if it wasn't for the design flaw in these heel straps, both would be such amazing shoes. These will only fit people with a perfectly sized Goldilocks medium heel.