here's a dirty trick.
Go in a show store.
getta couple pair of shoe (sizes).
Try them on, and figure which ones work best, then, re rebox then, YOURSELF!
So you can go to the the regististier yourself.
now, you've got a pair of 'out sorted' shoes!
Say, one is an an 7, and one is an 8..

I did this one time by accident once, when quite young. I didn't mean to, but I did.
Ya think shoe sales mans men care? I don't/ And,, I don't really care.