I'm a 40, but a few of my CL's, I've gone up to 40.5 on. And my Dahlia booties are a 41, which I would normally slip right out of, but seems to work in this case.
i typically wear a us 6.5-7 (though i don't know if my feet have shrunk, i've been more 6-6.5 lately) and my cl shoes are 36-37.5, with most of them 36.5 or 37.