This is actually my 2nd pair.  I wear a 7.5N ... I rarely, IF EVER, have a problem w/ shoes.  I read the reviews and thought I would try it just to be sure in a 7.5.  Sure enough they were too small.  Based on the reviews - I reordered an 8.5 and they fit great.  I LOVE these shoes for my Zumba class - on carpet anyway.  On the hardwood floors in the one studio though - they are way too slick!