My son wears a size 2 so I ordered a size 3/4. Did not fit. I will be returning and will order the size 5/6, as my son really liked the look and feel of these slippers. Also, one slipper arrived with a tear along the top seam. I attached pictures to show the sizing and the tear. Hopefully the new pair will fit and won't be damaged as they are nice looking and they feel very soft and comfy.