I bought the Wave Inspire 13 over two years ago based on recommendations from flat feet and a larger sock. I bought a pair and then a second pair (same model) because the first worked so well. They have become my favorite shoes. I just bought a newer model (Wave Inspire 15). The size is right, but there is no room for fingers. The shoe is noticeably sharper compared to the previous version and very uncomfortable. A real disappointment. Send back today.