We started with a size 6, then went to a 8 and we just ordered a 9 today. These new balance shoes have been proven to be extremely comfortable for my toddler.  They allow his feet to breathe, have excellent traction and stability and are a great value. The velcro latch is also a nice feature...no worries about annoying shoe laces.  I feel sorry for little toddlers when I see them wearing these stiff shoes that are designed purely from a marketing point with their spiderman designs and flashing lights, then for comfort.  The best toddler shoes out there !