I wear a size 10, sometimes an 11 depending on the type of shoe. I ordered these in a 10 and thought they fit great. The more I wore them the looser they got, but only in the heel. Whenever I wore them it felt like it was rubbing up and down my achilles tendon. It didn't give me the usual blister but it ripped up the skin and made it raw on both of my feet. I let that heal thinking I would give it one more go in these shoes. I tried them again today and now have blisters are both sides of both of my feet. I really liked this shoes. They were super comfortable to wear as long as I didn't try to do any sort of walking. I'm quite jealous of the people who don't have any issues with these shoes. I really wanted them to work out. I've never had an issue with any sketchers I've own in the past giving me blisters.