I bought these shoes because a number of articles listed these as one of the top 10 womens shoes for walking. I am a true 6.5M and all my adidas footwear are 6.5M. For these, I ordered a 6M based on the reviews. If you wear your adidas like I do, with no allowance whatsoever (meaning, when you put in your sock less feet, your toes will touch the tip of the shoes) then ordering a 1/2 size down would be the way to go. However, these shoes are really stiff and would require at least a pair of medium weight socks to ease some of the stiffness out. Because of this, a 6.5M, my regular size, would have made for a better fit. And no, these shoes are not on the wide side. My feet are between narrow and medium widths and I had difficulty putting these on. But they sure look bulky. Maybe because the toe section is more rounded than pointy.