Tried my usual size and had to return for a 1/2 size up, but totally worth the wait! I used to have several different pairs of Otomix back in the 90's, no clue why I ever stopped using them (price maybe during my broke years as an entrepreneur), but just got these and I'm in Heaven!  Most comfortable shoes ever, I can't believe these aren't more popular. Buying more pairs for me and even my Wife.