I purchased these on a deal of the day to wear casually when walking my dogs or boys around the neighborhood.  I could tell they were pretty comfortable except they were very tight across my forefoot.  More so on my left foot, which is odd because this is my larger foot.  Once I put socks on, it was unbearable.  I usually take a size 8D in most athletic shoes, but If you have a little wider feet like mine, I would opt for a size larger or maybe a larger width.