I had a pair of these many moons ago and wore them out. I am always a solid 10 shoe. Euro sizes can fluctuate for me. I followed the fit guidelines and bought an 11. I was swimming in them. They were very wide and long. Even the thickest of socks would not fix the issue. I have an average to wider foot. I sent the shoes back and ordered a 10. Much better fit in width and length. As expected. I should have ordered my normal size, but I was fearful. Live and learn. With that said, I can only wear thin socks. If I wear thick socks, I can feel my toe touch the front of the shoe. From my previous experiences, a little stretch will occur. I have onbly worn them a couple of times so far. They are very comfortable and seem to be a good quality. I recommend them.