I wear an 11 shoe normally but the size 12 fit me with a heavy wool sock. They are incredibly comfortable, I mean really comfortable & required absolutely no break in time. I wore them while hiking in rivers on wet rocks. It was hard not to feel like a superhero. These things stuck to wet rock. Felt so secure. After 1 week of use the sole began to pull away on one of the shoes by the heal. I called the company when I returned home. They were extremely nice but did say &#34;unfortunately these shoes tend to fall apart more than we would like to admit.&#34; He recommended that I call Amazon to get a full refund as that is where I bought them. I have now returned them but miss them & would likely give another pair a chance. If those do not break down then I would give these 5 star.