I have wide feet, a high arch and have trouble getting walking boots that fit, and usually end up having to get mens, that has changed with this boot, they fit lovely and no break in needed, they were instantly comfortable. I would stick to the size you are, as I do not think you have to go up a size with these, as I would normally have to go up to a 9 and I have an 8 that is a good fit, there is plenty of room. They are light weight and have been good for Dog walks and out an about in the lakes. As for how long they will last we will see, only had a couple of months. Highly recommend.