I'm about a size 8 in sandals, and size 9 in hiking shoes (don't like to feel the front of it). I tried these out in stores and ordered on Amazon. And I had to get 8.5 in these, even if my other Merrell hiking boots were 9. But other than sizing, I LOVE these shoes! I wore them hiking a week in the Alps and they were amazing. Didn't need to break them in, and paired with smartwool socks I had no blisters or any other issues. They are light, have great traction, and don't come off unless you untie them. That last part is nice if you're hiking in the mud at all. I have narrow, bony feet, and some shoe laces rub the top of my foot, but not these! I also like a roomy toe box, and these fit the bill once again. I'm getting a 2nd spare pair in case they discontinue this model!