These are my 4th shoes that I have tried for Zumba and I believe I found the perfect ones!  My ankles and knees have been bothering me so much that I had to stop cold turkey, wrap my feet with Ace bandages and take Advil.  I normally wear a 7.5 or 8 with gym shoes like Sketchers, but followed the many other reviews that stated to order 1 - 1.5 sizes up.  So glad I did.  I ordered a 9 and they fit like a glove!  I don't have narrow feet and my feet are a little wide so with the mesh and how soft the shoes are they are extremelly comfortable.  I highly recommend!