DD needed white ballet shoes to play Victoria in Cats.  I did not want to spend a fortune on shoes she will perform in 4 times. - so I started ordering from amazon.  Sizing is insane.  Different brands follow different sizing rules so be prepared to order a variety of sizes before you get it right.  This is the pair we ended up keeping.  The Bloch and Capezio shoes are also quite nice - but she preferred the split sole and the double elastic.  She wears a 4.5 girls in street shoes - a 4 in jazz shoes and a 5 in these.  Very confusing.  These are also less bright white than the other brands if that is an issue.