Aldi shoes- do they run big or small?

My cousin LOVES Disney. I just so happened to look on the app today and saw they have a Disney collab going on right now. She wears a 9 to 9 1/2 shoe size. I've never bought shoes from them, because they don't carry my size (I'm a 5-6), so I have no idea of the typical fit. Anyone have any idea?

I can't ask her to try them on or anything because she lives a ways away and I'm not sure if she has an Aldi. Any insight would be great!