Maybe just a little smaller than the New Balance MX623 that I have had for just over a year.  I have a narrow foot for my shoe size (10-1/2) and these fit well so for someone with an "average" foot they might be somewhat tight.  These also seem to require more break-in time than the previous pair. I rotate a couple of pairs of shoes so that I usually don't wear the same pair of shoes two days in a row - it makes them last longer as they have a chance to dry between wearings. The New Balance comfort is there, which I'm grateful for every day I wear these which is three to four days per week.