After the third try at sizing, finally got close to the correct size by going with the US equivalent of men's size 9.5 D.  The European/US size correlation chart for these shoes is off by two sizes (too large).  In US shoes I normally wear a size 11-D comfortably and I had to get a size 44, after trying the size 45 and 46 and sending them back.  Amazon Prime's return service and account services were superb, as usual.