Hello!
I'm new to the forum, I've been following all of the very informative threads for years - while the forum was still part of ballet.co.uk - and I've finally summoned up the courage to post.
I just wanted to chime in as I have a very wide foot - XXXXX in Grishko 2007s and I have found that going up half a size compared to my street shoe size in Freed men's leather ballet shoes, which seem to be wider, has helped. The leather stretches out over time - I normally wear the shoes at home first covered in socks to allow the heat of my feet to stretch out the leather - and the shoes tend to last for quite a while, I've just replaced my original pair after two years!