I love the Gel-Kayano 17. So, when I went to purchase the 18 and realized it fit too small, I got desperate! I came to Amazon and found that they had the 17 still in stock. I ordered not one but two pairs. I hate it when retailers change the specs on their products so am pretty disappointed in the 18. But the 17 rocks and are perfect for my sized/shaped feet. I have small heels but a wider toe box. If your feet are more narrow, maybe the 18's will in fact work for you.