So I wear an 11 1/2 and  and all the reviews people say by half size too small, I don't know about anybody else. But my feet are wide and they're in 11 1/2 but the 11s which I should've known better  are supertight.  So maybe be best if everybody doesn't listen to people who say the shoes run large, maybe people just normally buy shoes that  run small. Keen , Merrill they always fit me accurately. Birkenstock is the only shoe that has ever been inaccurate with sizing for me.  They're very nice shoes though