These run smaller than the Go Walk Autumn style; my right foot is bigger than left; ordered same size as Autumn style; little tight in the toes on Right. Would return but price was awesome; and the shoes feel great. EXCELLENT arch support, I am hoping they stretch a bit. Very comfortable. My heels are 'bones'; so my feet are almost walking out of these; since the arch is so high. Found that if I walk heel strike first; no problem. Although they are advertised as making you walk mid-foot first! Overall, I think I am really going to like the cushy comfort of these! So I really recommend these if you have 'normal' kinda-feet!