I wear a size 6.5 to 7 wide in women's. Even with a wide, I find women's size Keens are too snug fitting.  So even though they looked like good walking shoes and sandals I have never been able to find a size wide enough that wasn't too long. While browsing online, I saw the kids size. After more looking online, I found a FAQ on Keen's website that said larger youth sizes often overlap with smaller adult sizes, the difference being the youth sizes have a wider toe box. Thrilled, I ordered a youth size 5. Not only do they fit, they are a touch too big! Nothing a good sock doesn't fix, and I was pleased after striking out on so many adult sizes.<br /><br />I would say they are very comfortable. I wore all day while canning tuna and only started to have foot pain at the end of the day. The arch support wasn't fantastic, probably because these are designed for kids not adults, but it was sufficient. They are great for the short walks I take with my toddler, and I imagine will work well if we go hiking. I am not sure they will have enough arch support and ankle protection for really hard hiking, but for a reasonably well maintained trail, these should be fine.