Way too small.  I'm not sure if the whole series is this way, or if I just got a mislabeled shoe.  But I added a photo of this 623 next to my 990, both are a 12.5 4E.  It's pretty clear they are not the same size. (the 990 is a perfect fit for me though)<br /><br />I still love New Balance, this is the first time I've been let down by their sizing.