I ordered a different model with the same brand for my daughter and the sizing wasn't even close.  She had a 1.5 last year in the model that uses velcro so I ordered a 3 this year.  They were smaller than the 1.5 last year.  Her true foot size is a 3.  Nothing bad with the quality of the shoe but the sizing needs some work.  If you need to order this shoe, size up 1 to 2 sizes.