The sizing chart isn't accurate. I am a size 8.5 women street shoe. That equated to a 10W in Sansha silhouette canvas adult ballet slipper. However they are too small. I Tried to dance in them and it was painful. I hope in the future I am able to find the pair I need because these are super great slippers. I have a pair I have owned for a decade and they are only just now starting to obtain a small tear in the toe.