These must be super popular if so many sizes are on backorder. I ordered two pairs in the closest available sizes: 9.5C and 9B. I'm keeping the 9.5C and returning the 9B. The 9B was too narrow in width for me but good in length. Keeping the 9.5C because I generally don't mind a little extra toe space because I prefer wrapping my stirrup tights under my dance shoes to emphasize my arch anyway =D (For reference, my other So Danca sizes: 7L reg width in ballet flats, 7.5L wide in Lola character heels). Whenever I need a new pair, I'd probably get a size 9 in D.
Even with the rubber sole, I get much more traction and control in these than I do in my Bloch suede soles on wood floors. In fact, I'd like a little less traction in these. Still love them. The leather is thin and wraps my foot beautifully. My feet look so much more dainty in So Dancas than they do in Blochs or Capezios.