After reading reviews that these Birkenstock sandals run large, I changed the order from a 39 narrow to 38 narrow her foot is size 8 to 81/2. They fit her snug. I probably should have stayed w/ with the 39 N because there is no wiggle room for growth at all. She LOVES them...and I will too when she grows out of them haha!  I would say they run more true to size then huge though.