Vionic sandals are the most comfortable sandal I have ever worn. I have a flat foot and the built in arch is perfect for me. I already own three other pair of Vionic sandals so ordered my normal size 10. I could of used a 9 in this sandal. It is a little big...but i needed them that day so didn't take the time to send back and re order. These are cute and stylish. I saw them in a shoe store in red and fell in love with them.