I'm normally an 8 narrow.  The Euro 38's ( 7 to 7 1/2) fit perfect and my second toe is longer than my big toe and I still didn't need a 39. Amazingly comfortable shoe with the fabulous Ecco inner soul that's like walking on a pillow top.  Not my first Ecco's nor will they be my last.  This is the go to sandal for long term walking. The piece covering the heel is smooth and soft.  I wanted these for our overseas trip this summer and they will be perfect. I got the navy and love them so much I'm going to order the chili red.  The long side strap adds a little sex appeal too.  Ecco is well worth the price.  A good quality shoe that will last for many summers.