Just received my kitty cat mary jane's this after noon and I'm in love! They are simply adorable! I generally wear a size 7 1/2 to an 8 so I got the 8. They run very true to size. They're a tiny bit loose but it's honestly not even a big deal (I wore them with thin socks). I wore them for several hours this evening and they're already broken in...super comfy! I'm not sure why several people said they run narrow, they don't feel narrow at all....standard M width. I bought the black and white and I'm pretty sure I'm going to order the black also since I love them so much!! Don't hesitate, you won't regret picking up these shoes!!