Haven't worn them for more than a few hours at a time, but they are comfy so far. I read the other reviews and noted the complaint of the small size. I normally wear a size 5-5.5. Since there were no half sizes available I went ahead and risked getting a 5. The width is fine and it is just slightly smaller than I'd like. my heel isn't hanging off the end, but there really is much back there at all. I'll still wear them though. If they made half sizes I think the 5.5 would be perfect and probably the size 6 would be too big. I'm happy because the size/color I chose was only 9 bucks and I have prime, so overall a good deal. I probably wouldn't be as happy if I had to pay more for these though. (but I am super frugal and can't see spending more than 15 bucks on a pair of flip flops!)