These are the only shoes I can wear my full-size, semi-rigid custom orthotics in! I can do this because pulling out Privo's removable footbed in the shoe makes lots of room; literally the only pair of ballet flats I can wear without pain (after I broke them in, which took about 2-3 weeks).  I have to order this model in 1/2 size smaller than my usual size, but I also have narrow feet.