These are my 4th pair of oxfords from Piper Finn, and we love them so much! They are true to size. The leather may stretch a little which makes the fit last longer. For reference, my daughter is in between 9-10, depending on the brand (every brand runs different). So I got her a size 10 to be on the safe side. There’s a little room in the front, but, still fits and stays in place. She runs in them and finds the shoes very comfortable. On top of the cutest shoes, their customer service is amazing...