I received my 9.5 N ballet shoes today. Before ordering, I measured my foot from tip of big toe to end of heel.
Using that number, I decided to go a half size larger "just in case" some of the people who warned "too small" were talking about my kind of foot. Well, the shoes are even too small at half a size larger!! I always buy athletic shoes one whole size longer. If I buy these again, I will do that---so if you wear a 9, get a 10! The ballet shoes have the curved toe, and that design makes the big toe land on one of the short curved sides...well, mine anyway. Also, I have a very narrow heel, and they are too big in the heel...so too short and too wide a heel if you need a narrow size. However, I will keep them and maybe order a size 10N. Do measure your foot standing on a tape measurer, and to whatever size it says to get in the measurement instructions add one full size. I want to kick myself! :  kkp