Funny how sizes go.  I have older Asics lshoes size 10D and they tend to be a bit too large, at least they are most comfortable with heavier socks.  These new Asics in size 10D are considerably narrower than other Asics I have had.  I need to use very light socks and then they seem to fit well.  If you are borderline between sizes, go for the next larger size with these Asics.