After many years, I developed plantar fasciitis from cute cheap shoes. Ahh, aging, it aint for sissies! I bought these to replace cute sandals I had that had no support. They fit like a dream right out of the box, like the arches were molded to my foot in just the right place. Some arch supports can be to hard or too high. These are perfect. They are expensive, but worth not being in pain! And isn't that one of the pros of aging? Now I make the money to afford expensive, architecturally designed shoes! They run large-I wear a 6 in a sandal and a 5 is perfect. Love these so much. Thanks, Vionic, for making cute comfy (orthopedic-shhhh! ) shoes!