I am size 8 street and order size 6 C/D and it's perfect.  This is a great shoe.  I have been taking ballet for about a year now, and our class is on a pretty dirty floor (Zumba class is right before us). Considering the state of the dance floor, these have endured well.  I have a rip starting at the big toes for each shoe, so I will likely need to get a new pair in the next few months.

I love the split sole! Bloch is a great brand. The x-strap is really comfy- no bother with tying the shoe.