In my shoe size 38 I have the Kayano 20 in Gr. 39 ordered. It fits perfectly. I can recommend the shoe Normalpronierern and with a slight pronation. I have a slight pronation and Kayano gives me the necessary stability, so that the foot bends neither in, nor that I feel discomfort. My foot is normal width. In my weight of 55 kg, and average 8-10 km runs the shoe absorbs exactly as he intended. ASICS I'm used to that running shoes fit right from the start and do not press or rub-it is also the Kayano 20-tightening start walking-fall in love with the shoe :) I can recommend the running shoe very. The color is once again a real eye-catcher. The materials and workmanship are top notch. And the ease that you have felt at the bottom you have experienced. I wish everyone a lot of fun with this really good running shoes.